Moved gnuradio-core/src/utils/ plotting scripts into gr-utils, with some rework.

The gr_plot_data.py class installs into the gnuradio namespace as 
gnuradio.plot_data, and the remainder of the scripts install into 
$prefix/bin.


git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@7536 221aa14e-8319-0410-a670-987f0aec2ac5

11 files changed, 1312 insertions, 1 deletions

diff --git a/gr-utils/src/python/Makefile.am b/gr-utils/src/python/Makefile.am
index 231153636..8b190d660 100644
--- a/gr-utils/src/python/Makefile.am
+++ b/gr-utils/src/python/Makefile.am
@@ -19,10 +19,26 @@
 # Boston, MA 02110-1301, USA.
 # 
 
+include $(top_srcdir)/Makefile.common
+
 EXTRA_DIST = \
-    $(bin_SCRIPTS)
+    $(bin_SCRIPTS) \
+    README.plot
+
+ourpythondir = $(grpythondir)
+
+ourpython_PYTHON = \
+    plot_data.py
 
 bin_SCRIPTS = \
+    gr_plot_char.py \
+    gr_plot_const.py \
+    gr_plot_fft_c.py \
+    gr_plot_fft_f.py \
+    gr_plot_float.py \
+    gr_plot_int.py \
+    gr_plot_iq.py \
+    gr_plot_short.py \
     usrp_fft.py \
     usrp_oscope.py \
     usrp_print_db.py \
@@ -31,3 +47,5 @@ bin_SCRIPTS = \
     usrp_siggen.py \
     usrp_test_counting.py \
     usrp_test_loopback.py
+
+MOSTLYCLEANFILES = *~ *.pyc
diff --git a/gr-utils/src/python/README.plot b/gr-utils/src/python/README.plot
new file mode 100644
index 000000000..0c4657ba9
--- /dev/null
+++ b/gr-utils/src/python/README.plot
@@ -0,0 +1,40 @@
+* gr_plot_*.py:
+These are a collection of Python scripts to enable viewing and analysis of files produced by GNU Radio flow graphs. Most of them work off complex data produced by digital waveforms.
+
+
+** gr_plot_float.py:
+Takes a GNU Radio floating point binary file and displays the samples versus time. You can set the block size to specify how many points to read in at a time and the start position in the file.
+
+By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples.
+
+
+
+** gr_plot_iq.py:
+Takes a GNU Radio complex binary file and displays the I&Q data versus time. You can set the block size to specify how many points to read in at a time and the start position in the file.
+
+By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples.
+
+
+
+** gr_plot_const.py:
+Takes a GNU Radio complex binary file and displays the I&Q data versus time and the constellation plot (I vs. Q). You can set the block size to specify how many points to read in at a time and the start position in the file.
+
+By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples.
+
+
+
+** gr_plot_fft_c.py:
+Takes a GNU Radio complex binary file and displays the I&Q data versus time as well as the frequency domain (FFT) plot. The y-axis values are plotted assuming volts as the amplitude of the I&Q streams and converted into dBm in the frequency domain (the 1/N power adjustment out of the FFT is performed internally).
+
+The script plots a certain block of data at a time, specified on the command line as -B or --block. This value defaults to 1000. The start position in the file can be set by specifying -s or --start and defaults to 0 (the start of the file).
+
+By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time and frequency axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples.
+
+
+
+** gr_plot_fft_f.py:
+Takes a GNU Radio floating point binary file and displays the samples versus time as well as the frequency domain (FFT) plot. The y-axis values are plotted assuming volts as the amplitude of the I&Q streams and converted into dBm in the frequency domain (the 1/N power adjustment out of the FFT is performed internally).
+
+The script plots a certain block of data at a time, specified on the command line as -B or --block. This value defaults to 1000. The start position in the file can be set by specifying -s or --start and defaults to 0 (the start of the file).
+
+By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time and frequency axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples.
diff --git a/gr-utils/src/python/gr_plot_char.py b/gr-utils/src/python/gr_plot_char.py
new file mode 100755
index 000000000..87a323c9c
--- /dev/null
+++ b/gr-utils/src/python/gr_plot_char.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+#
+# Copyright 2007,2008 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+try:
+    import scipy
+except ImportError:
+    print "Please install SciPy to run this script (http://www.scipy.org/)"
+    raise SystemExit, 1
+
+from optparse import OptionParser
+from gnuradio.plot_data import plot_data
+
+def main():
+    usage="%prog: [options] input_filenames"
+    description = "Takes a GNU Radio byte/char binary file and displays the samples versus time. You can set the block size to specify how many points to read in at a time and the start position in the file. By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples."
+
+    parser = OptionParser(conflict_handler="resolve", usage=usage, description=description)
+    parser.add_option("-B", "--block", type="int", default=1000,
+                      help="Specify the block size [default=%default]")
+    parser.add_option("-s", "--start", type="int", default=0,
+                      help="Specify where to start in the file [default=%default]")
+    parser.add_option("-R", "--sample-rate", type="float", default=1.0,
+                      help="Set the sampler rate of the data [default=%default]")
+    
+    (options, args) = parser.parse_args ()
+    if len(args) < 1:
+        parser.print_help()
+        raise SystemExit, 1
+    filenames = args
+
+    datatype=scipy.int8
+    dc = plot_data(datatype, filenames, options)
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        pass
+    
diff --git a/gr-utils/src/python/gr_plot_const.py b/gr-utils/src/python/gr_plot_const.py
new file mode 100755
index 000000000..d9a9daabf
--- /dev/null
+++ b/gr-utils/src/python/gr_plot_const.py
@@ -0,0 +1,208 @@
+#!/usr/bin/env python
+#
+# Copyright 2007,2008 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+try:
+    import scipy
+except ImportError:
+    print "Please install SciPy to run this script (http://www.scipy.org/)"
+    raise SystemExit, 1
+
+try:
+    from pylab import *
+    from matplotlib.font_manager import fontManager, FontProperties
+except ImportError:
+    print "Please install Matplotlib to run this script (http://matplotlib.sourceforge.net/)"
+    raise SystemExit, 1
+
+from optparse import OptionParser
+
+matplotlib.interactive(True)
+matplotlib.use('TkAgg')
+
+class draw_constellation:
+    def __init__(self, filename, options):
+        self.hfile = open(filename, "r")
+        self.block_length = options.block
+        self.start = options.start
+        self.sample_rate = options.sample_rate
+
+        self.datatype = scipy.complex64
+        self.sizeof_data = self.datatype().nbytes    # number of bytes per sample in file
+
+        self.axis_font_size = 16
+        self.label_font_size = 18
+        self.title_font_size = 20
+
+        # Setup PLOT
+        self.fig = figure(1, figsize=(16, 9), facecolor='w')
+        rcParams['xtick.labelsize'] = self.axis_font_size
+        rcParams['ytick.labelsize'] = self.axis_font_size
+        
+        self.text_file     = figtext(0.10, 0.95, ("File: %s" % filename), weight="heavy", size=16)
+        self.text_file_pos = figtext(0.10, 0.90, "File Position: ", weight="heavy", size=16)
+        self.text_block    = figtext(0.40, 0.90, ("Block Size: %d" % self.block_length),
+                                     weight="heavy", size=16)        
+        self.text_sr       = figtext(0.60, 0.90, ("Sample Rate: %.2f" % self.sample_rate),
+                                     weight="heavy", size=16)
+        self.make_plots()
+
+        self.button_left_axes = self.fig.add_axes([0.45, 0.01, 0.05, 0.05], frameon=True)
+        self.button_left = Button(self.button_left_axes, "<")
+        self.button_left_callback = self.button_left.on_clicked(self.button_left_click)
+
+        self.button_right_axes = self.fig.add_axes([0.50, 0.01, 0.05, 0.05], frameon=True)
+        self.button_right = Button(self.button_right_axes, ">")
+        self.button_right_callback = self.button_right.on_clicked(self.button_right_click)
+
+        self.xlim = self.sp_iq.get_xlim()
+
+        self.manager = get_current_fig_manager()
+        connect('draw_event', self.zoom)
+        connect('key_press_event', self.click)
+        show()
+
+    def get_data(self):
+        self.text_file_pos.set_text("File Position: %d" % (self.hfile.tell()//self.sizeof_data))
+        iq = scipy.fromfile(self.hfile, dtype=self.datatype, count=self.block_length)
+        #print "Read in %d items" % len(iq)
+        if(len(iq) == 0):
+            print "End of File"
+        else:
+            self.reals = [r.real for r in iq]
+            self.imags = [i.imag for i in iq]
+
+            self.time = [i*(1/self.sample_rate) for i in range(len(self.reals))]
+            
+    def make_plots(self):
+        # if specified on the command-line, set file pointer
+        self.hfile.seek(self.sizeof_data*self.start, 1)
+
+        self.get_data()
+        
+        # Subplot for real and imaginary parts of signal
+        self.sp_iq = self.fig.add_subplot(2,1,1, position=[0.075, 0.2, 0.4, 0.6])
+        self.sp_iq.set_title(("I&Q"), fontsize=self.title_font_size, fontweight="bold")
+        self.sp_iq.set_xlabel("Time (s)", fontsize=self.label_font_size, fontweight="bold")
+        self.sp_iq.set_ylabel("Amplitude (V)", fontsize=self.label_font_size, fontweight="bold")
+        self.plot_iq = plot(self.time, self.reals, 'bo-', self.time, self.imags, 'ro-')
+        self.sp_iq.axis([min(self.time), max(self.time),
+                         1.5*min([min(self.reals), min(self.imags)]),
+                         1.5*max([max(self.reals), max(self.imags)])])
+
+        # Subplot for constellation plot
+        self.sp_const = self.fig.add_subplot(2,2,1, position=[0.575, 0.2, 0.4, 0.6])
+        self.sp_const.set_title(("Constellation"), fontsize=self.title_font_size, fontweight="bold")
+        self.sp_const.set_xlabel("Inphase", fontsize=self.label_font_size, fontweight="bold")
+        self.sp_const.set_ylabel("Qaudrature", fontsize=self.label_font_size, fontweight="bold")
+        self.plot_const = plot(self.reals, self.imags, 'bo')
+        self.sp_const.axis([-2, 2, -2, 2])
+
+        draw()
+
+    def update_plots(self):
+        self.plot_iq[0].set_data([self.time, self.reals])
+        self.plot_iq[1].set_data([self.time, self.imags])
+        self.sp_iq.axis([min(self.time), max(self.time),
+                         1.5*min([min(self.reals), min(self.imags)]),
+                         1.5*max([max(self.reals), max(self.imags)])])
+
+        self.plot_const[0].set_data([self.reals, self.imags])
+        self.sp_const.axis([-2, 2, -2, 2])
+        draw()
+        
+    def zoom(self, event):
+        newxlim = self.sp_iq.get_xlim()
+        if(newxlim != self.xlim):
+            self.xlim = newxlim
+            r = self.reals[int(ceil(self.xlim[0])) : int(ceil(self.xlim[1]))]
+            i = self.imags[int(ceil(self.xlim[0])) : int(ceil(self.xlim[1]))]
+
+            self.plot_const[0].set_data(r, i)
+            self.sp_const.axis([-2, 2, -2, 2])
+            self.manager.canvas.draw()
+            draw()
+
+    def click(self, event):
+        forward_valid_keys = [" ", "down", "right"]
+        backward_valid_keys = ["up", "left"]
+
+        if(find(event.key, forward_valid_keys)):
+            self.step_forward()
+            
+        elif(find(event.key, backward_valid_keys)):
+            self.step_backward()
+
+    def button_left_click(self, event):
+        self.step_backward()
+
+    def button_right_click(self, event):
+        self.step_forward()
+
+    def step_forward(self):
+        self.get_data()
+        self.update_plots()
+
+    def step_backward(self):
+        # Step back in file position
+        if(self.hfile.tell() >= 2*self.sizeof_data*self.block_length ):
+            self.hfile.seek(-2*self.sizeof_data*self.block_length, 1)
+        else:
+            self.hfile.seek(-self.hfile.tell(),1)
+        self.get_data()
+        self.update_plots()
+        
+            
+def find(item_in, list_search):
+    try:
+	return list_search.index(item_in) != None
+    except ValueError:
+	return False
+	
+
+def main():
+    usage="%prog: [options] input_filename"
+    description = "Takes a GNU Radio complex binary file and displays the I&Q data versus time and the constellation plot (I vs. Q). You can set the block size to specify how many points to read in at a time and the start position in the file. By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples."
+
+    parser = OptionParser(conflict_handler="resolve", usage=usage, description=description)
+    parser.add_option("-B", "--block", type="int", default=1000,
+                      help="Specify the block size [default=%default]")
+    parser.add_option("-s", "--start", type="int", default=0,
+                      help="Specify where to start in the file [default=%default]")
+    parser.add_option("-R", "--sample-rate", type="float", default=1.0,
+                      help="Set the sampler rate of the data [default=%default]")
+    
+    (options, args) = parser.parse_args ()
+    if len(args) != 1:
+        parser.print_help()
+        raise SystemExit, 1
+    filename = args[0]
+
+    dc = draw_constellation(filename, options)
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        pass
+    
+
+
diff --git a/gr-utils/src/python/gr_plot_fft_c.py b/gr-utils/src/python/gr_plot_fft_c.py
new file mode 100755
index 000000000..b7b802fd7
--- /dev/null
+++ b/gr-utils/src/python/gr_plot_fft_c.py
@@ -0,0 +1,231 @@
+#!/usr/bin/env python
+#
+# Copyright 2007,2008 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+try:
+    import scipy
+    from scipy import fftpack
+except ImportError:
+    print "Please install SciPy to run this script (http://www.scipy.org/)"
+    raise SystemExit, 1
+
+try:
+    from pylab import *
+except ImportError:
+    print "Please install Matplotlib to run this script (http://matplotlib.sourceforge.net/)"
+    raise SystemExit, 1
+
+from optparse import OptionParser
+from math import log10
+
+matplotlib.interactive(True)
+matplotlib.use('TkAgg')
+
+class draw_fft_c:
+    def __init__(self, filename, options):
+        self.hfile = open(filename, "r")
+        self.block_length = options.block
+        self.start = options.start
+        self.sample_rate = options.sample_rate
+
+        self.datatype = scipy.complex64
+        self.sizeof_data = self.datatype().nbytes    # number of bytes per sample in file
+
+        self.axis_font_size = 16
+        self.label_font_size = 18
+        self.title_font_size = 20
+        self.text_size = 22
+
+        # Setup PLOT
+        self.fig = figure(1, figsize=(16, 9), facecolor='w')
+        rcParams['xtick.labelsize'] = self.axis_font_size
+        rcParams['ytick.labelsize'] = self.axis_font_size
+        
+        self.text_file     = figtext(0.10, 0.94, ("File: %s" % filename), weight="heavy", size=self.text_size)
+        self.text_file_pos = figtext(0.10, 0.88, "File Position: ", weight="heavy", size=self.text_size)
+        self.text_block    = figtext(0.40, 0.88, ("Block Size: %d" % self.block_length),
+                                     weight="heavy", size=self.text_size)
+        self.text_sr       = figtext(0.60, 0.88, ("Sample Rate: %.2f" % self.sample_rate),
+                                     weight="heavy", size=self.text_size)
+        self.make_plots()
+
+        self.button_left_axes = self.fig.add_axes([0.45, 0.01, 0.05, 0.05], frameon=True)
+        self.button_left = Button(self.button_left_axes, "<")
+        self.button_left_callback = self.button_left.on_clicked(self.button_left_click)
+
+        self.button_right_axes = self.fig.add_axes([0.50, 0.01, 0.05, 0.05], frameon=True)
+        self.button_right = Button(self.button_right_axes, ">")
+        self.button_right_callback = self.button_right.on_clicked(self.button_right_click)
+
+        self.xlim = self.sp_iq.get_xlim()
+
+        self.manager = get_current_fig_manager()
+        connect('draw_event', self.zoom)
+        connect('key_press_event', self.click)
+        show()
+        
+    def get_data(self):
+        self.text_file_pos.set_text("File Position: %d" % (self.hfile.tell()//self.sizeof_data))
+        self.iq = scipy.fromfile(self.hfile, dtype=self.datatype, count=self.block_length)
+        #print "Read in %d items" % len(self.iq)
+        if(len(self.iq) == 0):
+            print "End of File"
+        else:
+            self.reals = [r.real for r in self.iq]
+            self.imags = [i.imag for i in self.iq]
+
+            self.iq_fft = self.dofft(self.iq)
+
+            self.time = [i*(1/self.sample_rate) for i in range(len(self.reals))]
+            self.freq = self.calc_freq(self.time, self.sample_rate)
+
+            
+    def dofft(self, iq):
+        N = len(iq)
+        iq_fft = fftpack.fftshift(scipy.fft(iq))       # fft and shift axis
+        iq_fft = [20*log10(abs(i/N)) for i in iq_fft]  # convert to decibels, adjust power
+        return iq_fft
+
+    def calc_freq(self, time, sample_rate):
+        N = len(time)
+        Fs = 1.0 / (max(time) - min(time))
+        Fn = 0.5 * sample_rate
+        freq = [-Fn + i*Fs for i in range(N)]
+        return freq
+        
+    def make_plots(self):
+        # if specified on the command-line, set file pointer
+        self.hfile.seek(self.sizeof_data*self.start, 1)
+
+        self.get_data()
+        
+        # Subplot for real and imaginary parts of signal
+        self.sp_iq = self.fig.add_subplot(2,1,1, position=[0.075, 0.2, 0.4, 0.6])
+        self.sp_iq.set_title(("I&Q"), fontsize=self.title_font_size, fontweight="bold")
+        self.sp_iq.set_xlabel("Time (s)", fontsize=self.label_font_size, fontweight="bold")
+        self.sp_iq.set_ylabel("Amplitude (V)", fontsize=self.label_font_size, fontweight="bold")
+        self.plot_iq = plot(self.time, self.reals, 'bo-', self.time, self.imags, 'ro-')
+        self.sp_iq.set_ylim([1.5*min([min(self.reals), min(self.imags)]),
+                             1.5*max([max(self.reals), max(self.imags)])])
+
+        # Subplot for constellation plot
+        self.sp_fft = self.fig.add_subplot(2,2,1, position=[0.575, 0.2, 0.4, 0.6])
+        self.sp_fft.set_title(("FFT"), fontsize=self.title_font_size, fontweight="bold")
+        self.sp_fft.set_xlabel("Frequency (Hz)", fontsize=self.label_font_size, fontweight="bold")
+        self.sp_fft.set_ylabel("Power (dBm)", fontsize=self.label_font_size, fontweight="bold")
+        self.plot_fft = plot(self.freq, self.iq_fft, '-bo')
+        self.sp_fft.set_ylim([min(self.iq_fft)-10, max(self.iq_fft)+10])
+        
+        draw()
+
+    def update_plots(self):
+        self.plot_iq[0].set_data([self.time, self.reals])
+        self.plot_iq[1].set_data([self.time, self.imags])
+        self.sp_iq.set_ylim([1.5*min([min(self.reals), min(self.imags)]),
+                             1.5*max([max(self.reals), max(self.imags)])])
+
+        self.plot_fft[0].set_data([self.freq, self.iq_fft])
+        self.sp_fft.set_ylim([min(self.iq_fft)-10, max(self.iq_fft)+10])
+
+        draw()
+        
+    def zoom(self, event):
+        newxlim = self.sp_iq.get_xlim()
+        if(newxlim != self.xlim):
+            self.xlim = newxlim
+            xmin = max(0, int(ceil(self.sample_rate*self.xlim[0])))
+            xmax = min(int(ceil(self.sample_rate*self.xlim[1])), len(self.iq))
+
+            iq = self.iq[xmin : xmax]
+            time = self.time[xmin : xmax]
+            
+            iq_fft = self.dofft(iq)
+            freq = self.calc_freq(time, self.sample_rate)
+            
+            self.plot_fft[0].set_data(freq, iq_fft)
+            self.sp_fft.axis([min(freq), max(freq),
+                              min(iq_fft)-10, max(iq_fft)+10])
+
+            draw()
+
+    def click(self, event):
+        forward_valid_keys = [" ", "down", "right"]
+        backward_valid_keys = ["up", "left"]
+
+        if(find(event.key, forward_valid_keys)):
+            self.step_forward()
+            
+        elif(find(event.key, backward_valid_keys)):
+            self.step_backward()
+
+    def button_left_click(self, event):
+        self.step_backward()
+
+    def button_right_click(self, event):
+        self.step_forward()
+
+    def step_forward(self):
+        self.get_data()
+        self.update_plots()
+
+    def step_backward(self):
+        # Step back in file position
+        if(self.hfile.tell() >= 2*self.sizeof_data*self.block_length ):
+            self.hfile.seek(-2*self.sizeof_data*self.block_length, 1)
+        else:
+            self.hfile.seek(-self.hfile.tell(),1)
+        self.get_data()
+        self.update_plots()
+        
+def find(item_in, list_search):
+    try:
+	return list_search.index(item_in) != None
+    except ValueError:
+	return False
+
+def main():
+    usage="%prog: [options] input_filename"
+    description = "Takes a GNU Radio complex binary file and displays the I&Q data versus time as well as the frequency domain (FFT) plot. The y-axis values are plotted assuming volts as the amplitude of the I&Q streams and converted into dBm in the frequency domain (the 1/N power adjustment out of the FFT is performed internally). The script plots a certain block of data at a time, specified on the command line as -B or --block. This value defaults to 1000. The start position in the file can be set by specifying -s or --start and defaults to 0 (the start of the file). By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time and frequency axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples."
+
+    parser = OptionParser(conflict_handler="resolve", usage=usage, description=description)
+    parser.add_option("-B", "--block", type="int", default=1000,
+                      help="Specify the block size [default=%default]")
+    parser.add_option("-s", "--start", type="int", default=0,
+                      help="Specify where to start in the file [default=%default]")
+    parser.add_option("-R", "--sample-rate", type="float", default=1.0,
+                      help="Set the sampler rate of the data [default=%default]")
+    
+    (options, args) = parser.parse_args ()
+    if len(args) != 1:
+        parser.print_help()
+        raise SystemExit, 1
+    filename = args[0]
+
+    dc = draw_fft_c(filename, options)
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        pass
+    
+
+
diff --git a/gr-utils/src/python/gr_plot_fft_f.py b/gr-utils/src/python/gr_plot_fft_f.py
new file mode 100755
index 000000000..8f545c589
--- /dev/null
+++ b/gr-utils/src/python/gr_plot_fft_f.py
@@ -0,0 +1,234 @@
+#!/usr/bin/env python
+#
+# Copyright 2007,2008 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+try:
+    import scipy
+    from scipy import fftpack
+except ImportError:
+    print "Please install SciPy to run this script (http://www.scipy.org/)"
+    raise SystemExit, 1
+
+try:
+    from pylab import *
+except ImportError:
+    print "Please install Matplotlib to run this script (http://matplotlib.sourceforge.net/)"
+    raise SystemExit, 1
+
+from optparse import OptionParser
+from math import log10
+
+matplotlib.interactive(True)
+matplotlib.use('TkAgg')
+
+class draw_fft_f:
+    def __init__(self, filename, options):
+        self.hfile = open(filename, "r")
+        self.block_length = options.block
+        self.start = options.start
+        self.sample_rate = options.sample_rate
+
+        self.datatype = scipy.float32
+        self.sizeof_data = self.datatype().nbytes    # number of bytes per sample in file
+
+        self.axis_font_size = 16
+        self.label_font_size = 18
+        self.title_font_size = 20
+        self.text_size = 22
+
+        # Setup PLOT
+        self.fig = figure(1, figsize=(16, 9), facecolor='w')
+        rcParams['xtick.labelsize'] = self.axis_font_size
+        rcParams['ytick.labelsize'] = self.axis_font_size
+        
+        self.text_file     = figtext(0.10, 0.94, ("File: %s" % filename), weight="heavy", size=self.text_size)
+        self.text_file_pos = figtext(0.10, 0.88, "File Position: ", weight="heavy", size=self.text_size)
+        self.text_block    = figtext(0.40, 0.88, ("Block Size: %d" % self.block_length),
+                                     weight="heavy", size=self.text_size)
+        self.text_sr       = figtext(0.60, 0.88, ("Sample Rate: %.2f" % self.sample_rate),
+                                     weight="heavy", size=self.text_size)
+        self.make_plots()
+
+        self.button_left_axes = self.fig.add_axes([0.45, 0.01, 0.05, 0.05], frameon=True)
+        self.button_left = Button(self.button_left_axes, "<")
+        self.button_left_callback = self.button_left.on_clicked(self.button_left_click)
+
+        self.button_right_axes = self.fig.add_axes([0.50, 0.01, 0.05, 0.05], frameon=True)
+        self.button_right = Button(self.button_right_axes, ">")
+        self.button_right_callback = self.button_right.on_clicked(self.button_right_click)
+
+        self.xlim = self.sp_f.get_xlim()
+
+        self.manager = get_current_fig_manager()
+        connect('draw_event', self.zoom)
+        connect('key_press_event', self.click)
+        show()
+        
+    def get_data(self):
+        self.text_file_pos.set_text("File Position: %d" % (self.hfile.tell()//self.sizeof_data))
+        self.floats = scipy.fromfile(self.hfile, dtype=self.datatype, count=self.block_length)
+        #print "Read in %d items" % len(self.floats)
+        if(len(self.floats) == 0):
+            print "End of File"
+        else:
+            self.f_fft = self.dofft(self.floats)
+
+            self.time = [i*(1/self.sample_rate) for i in range(len(self.floats))]
+            self.freq = self.calc_freq(self.time, self.sample_rate)
+            
+    def dofft(self, f):
+        N = len(f)
+        f_fft = fftpack.fftshift(scipy.fft(f))       # fft and shift axis
+        f_dB = list()
+        for f in f_fft:
+            try:
+                f_dB.append(20*log10(abs(f/N)))  # convert to decibels, adjust power
+            except OverflowError:                # protect against taking log(0)
+                f = 1e-14                        # not sure if this is the best way to do this
+                f_dB.append(20*log10(abs(f/N)))
+                
+        return f_dB
+
+    def calc_freq(self, time, sample_rate):
+        N = len(time)
+        Fs = 1.0 / (max(time) - min(time))
+        Fn = 0.5 * sample_rate
+        freq = [-Fn + i*Fs for i in range(N)]
+        return freq
+        
+    def make_plots(self):
+        # if specified on the command-line, set file pointer
+        self.hfile.seek(self.sizeof_data*self.start, 1)
+
+        self.get_data()
+        
+        # Subplot for real and imaginary parts of signal
+        self.sp_f = self.fig.add_subplot(2,1,1, position=[0.075, 0.2, 0.4, 0.6])
+        self.sp_f.set_title(("Amplitude"), fontsize=self.title_font_size, fontweight="bold")
+        self.sp_f.set_xlabel("Time (s)", fontsize=self.label_font_size, fontweight="bold")
+        self.sp_f.set_ylabel("Amplitude (V)", fontsize=self.label_font_size, fontweight="bold")
+        self.plot_f = plot(self.time, self.floats, 'bo-')
+        self.sp_f.set_ylim([1.5*min(self.floats),
+                            1.5*max(self.floats)])
+
+        # Subplot for constellation plot
+        self.sp_fft = self.fig.add_subplot(2,2,1, position=[0.575, 0.2, 0.4, 0.6])
+        self.sp_fft.set_title(("FFT"), fontsize=self.title_font_size, fontweight="bold")
+        self.sp_fft.set_xlabel("Frequency (Hz)", fontsize=self.label_font_size, fontweight="bold")
+        self.sp_fft.set_ylabel("Power (dBm)", fontsize=self.label_font_size, fontweight="bold")
+        self.plot_fft = plot(self.freq, self.f_fft, '-bo')
+        self.sp_fft.set_ylim([min(self.f_fft)-10, max(self.f_fft)+10])
+        
+        draw()
+
+    def update_plots(self):
+        self.plot_f[0].set_data([self.time, self.floats])
+        self.sp_f.set_ylim([1.5*min(self.floats),
+                            1.5*max(self.floats)])
+
+        self.plot_fft[0].set_data([self.freq, self.f_fft])
+        self.sp_fft.set_ylim([min(self.f_fft)-10, max(self.f_fft)+10])
+
+        draw()
+        
+    def zoom(self, event):
+        newxlim = self.sp_f.get_xlim()
+        if(newxlim != self.xlim):
+            self.xlim = newxlim
+            xmin = max(0, int(ceil(self.sample_rate*self.xlim[0])))
+            xmax = min(int(ceil(self.sample_rate*self.xlim[1])), len(self.floats))
+
+            f = self.floats[xmin : xmax]
+            time = self.time[xmin : xmax]
+            
+            f_fft = self.dofft(f)
+            freq = self.calc_freq(time, self.sample_rate)
+                        
+            self.plot_fft[0].set_data(freq, f_fft)
+            self.sp_fft.axis([min(freq), max(freq),
+                              min(f_fft)-10, max(f_fft)+10])
+
+            draw()
+
+    def click(self, event):
+        forward_valid_keys = [" ", "down", "right"]
+        backward_valid_keys = ["up", "left"]
+
+        if(find(event.key, forward_valid_keys)):
+            self.step_forward()
+            
+        elif(find(event.key, backward_valid_keys)):
+            self.step_backward()
+
+    def button_left_click(self, event):
+        self.step_backward()
+
+    def button_right_click(self, event):
+        self.step_forward()
+
+    def step_forward(self):
+        self.get_data()
+        self.update_plots()
+
+    def step_backward(self):
+        # Step back in file position
+        if(self.hfile.tell() >= 2*self.sizeof_data*self.block_length ):
+            self.hfile.seek(-2*self.sizeof_data*self.block_length, 1)
+        else:
+            self.hfile.seek(-self.hfile.tell(),1)
+        self.get_data()
+        self.update_plots()
+        
+            
+def find(item_in, list_search):
+    try:
+	return list_search.index(item_in) != None
+    except ValueError:
+	return False
+		
+def main():
+    usage="%prog: [options] input_filename"
+    description = "Takes a GNU Radio floating point binary file and displays the sample data versus time as well as the frequency domain (FFT) plot. The y-axis values are plotted assuming volts as the amplitude of the I&Q streams and converted into dBm in the frequency domain (the 1/N power adjustment out of the FFT is performed internally). The script plots a certain block of data at a time, specified on the command line as -B or --block. This value defaults to 1000. The start position in the file can be set by specifying -s or --start and defaults to 0 (the start of the file). By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time and frequency axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples."
+
+    parser = OptionParser(conflict_handler="resolve", usage=usage, description=description)
+    parser.add_option("-B", "--block", type="int", default=1000,
+                      help="Specify the block size [default=%default]")
+    parser.add_option("-s", "--start", type="int", default=0,
+                      help="Specify where to start in the file [default=%default]")
+    parser.add_option("-R", "--sample-rate", type="float", default=1.0,
+                      help="Set the sampler rate of the data [default=%default]")
+    
+    (options, args) = parser.parse_args ()
+    if len(args) != 1:
+        parser.print_help()
+        raise SystemExit, 1
+    filename = args[0]
+
+    dc = draw_fft_f(filename, options)
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        pass
+    
+
+
diff --git a/gr-utils/src/python/gr_plot_float.py b/gr-utils/src/python/gr_plot_float.py
new file mode 100755
index 000000000..e5c22a315
--- /dev/null
+++ b/gr-utils/src/python/gr_plot_float.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+#
+# Copyright 2007,2008 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+try:
+    import scipy
+except ImportError:
+    print "Please install SciPy to run this script (http://www.scipy.org/)"
+    raise SystemExit, 1
+
+from optparse import OptionParser
+from gnuradio.plot_data import plot_data
+
+def main():
+    usage="%prog: [options] input_filenames"
+    description = "Takes a GNU Radio floating point binary file and displays the samples versus time. You can set the block size to specify how many points to read in at a time and the start position in the file. By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples."
+
+    parser = OptionParser(conflict_handler="resolve", usage=usage, description=description)
+    parser.add_option("-B", "--block", type="int", default=1000,
+                      help="Specify the block size [default=%default]")
+    parser.add_option("-s", "--start", type="int", default=0,
+                      help="Specify where to start in the file [default=%default]")
+    parser.add_option("-R", "--sample-rate", type="float", default=1.0,
+                      help="Set the sampler rate of the data [default=%default]")
+    
+    (options, args) = parser.parse_args ()
+    if len(args) < 1:
+        parser.print_help()
+        raise SystemExit, 1
+    filenames = args
+
+    datatype=scipy.float32
+    dc = plot_data(datatype, filenames, options)
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        pass
+    
diff --git a/gr-utils/src/python/gr_plot_int.py b/gr-utils/src/python/gr_plot_int.py
new file mode 100755
index 000000000..b44d4360a
--- /dev/null
+++ b/gr-utils/src/python/gr_plot_int.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+#
+# Copyright 2007,2008 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+try:
+    import scipy
+except ImportError:
+    print "Please install SciPy to run this script (http://www.scipy.org/)"
+    raise SystemExit, 1
+
+from optparse import OptionParser
+from gnuradio.plot_data import plot_data
+
+def main():
+    usage="%prog: [options] input_filenames"
+    description = "Takes a GNU Radio integer binary file and displays the samples versus time. You can set the block size to specify how many points to read in at a time and the start position in the file. By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples."
+
+    parser = OptionParser(conflict_handler="resolve", usage=usage, description=description)
+    parser.add_option("-B", "--block", type="int", default=1000,
+                      help="Specify the block size [default=%default]")
+    parser.add_option("-s", "--start", type="int", default=0,
+                      help="Specify where to start in the file [default=%default]")
+    parser.add_option("-R", "--sample-rate", type="float", default=1.0,
+                      help="Set the sampler rate of the data [default=%default]")
+    
+    (options, args) = parser.parse_args ()
+    if len(args) < 1:
+        parser.print_help()
+        raise SystemExit, 1
+    filenames = args
+
+    datatype=scipy.int32
+    dc = plot_data(datatype, filenames, options)
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        pass
+    
diff --git a/gr-utils/src/python/gr_plot_iq.py b/gr-utils/src/python/gr_plot_iq.py
new file mode 100755
index 000000000..2a4142a81
--- /dev/null
+++ b/gr-utils/src/python/gr_plot_iq.py
@@ -0,0 +1,180 @@
+#!/usr/bin/env python
+#
+# Copyright 2007,2008 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+try:
+    import scipy
+except ImportError:
+    print "Please install SciPy to run this script (http://www.scipy.org/)"
+    raise SystemExit, 1
+
+try:
+    from pylab import *
+except ImportError:
+    print "Please install Matplotlib to run this script (http://matplotlib.sourceforge.net/)"
+    raise SystemExit, 1
+
+from optparse import OptionParser
+
+matplotlib.interactive(True)
+matplotlib.use('TkAgg')
+
+class draw_fft:
+    def __init__(self, filename, options):
+        self.hfile = open(filename, "r")
+        self.block_length = options.block
+        self.start = options.start
+        self.sample_rate = options.sample_rate
+
+        self.datatype = scipy.complex64
+        self.sizeof_data = self.datatype().nbytes    # number of bytes per sample in file
+
+        self.axis_font_size = 16
+        self.label_font_size = 18
+        self.title_font_size = 20
+        self.text_size = 22
+
+        # Setup PLOT
+        self.fig = figure(1, figsize=(16, 9), facecolor='w')
+        rcParams['xtick.labelsize'] = self.axis_font_size
+        rcParams['ytick.labelsize'] = self.axis_font_size
+        
+        self.text_file     = figtext(0.10, 0.94, ("File: %s" % filename), weight="heavy", size=self.text_size)
+        self.text_file_pos = figtext(0.10, 0.88, "File Position: ", weight="heavy", size=self.text_size)
+        self.text_block    = figtext(0.40, 0.88, ("Block Size: %d" % self.block_length),
+                                     weight="heavy", size=self.text_size)
+        self.text_sr       = figtext(0.60, 0.88, ("Sample Rate: %.2f" % self.sample_rate),
+                                     weight="heavy", size=self.text_size)
+        self.make_plots()
+
+        self.button_left_axes = self.fig.add_axes([0.45, 0.01, 0.05, 0.05], frameon=True)
+        self.button_left = Button(self.button_left_axes, "<")
+        self.button_left_callback = self.button_left.on_clicked(self.button_left_click)
+
+        self.button_right_axes = self.fig.add_axes([0.50, 0.01, 0.05, 0.05], frameon=True)
+        self.button_right = Button(self.button_right_axes, ">")
+        self.button_right_callback = self.button_right.on_clicked(self.button_right_click)
+
+        self.xlim = self.sp_iq.get_xlim()
+
+        self.manager = get_current_fig_manager()
+        connect('key_press_event', self.click)
+        show()
+
+    def get_data(self):
+        self.text_file_pos.set_text("File Position: %d" % (self.hfile.tell()//self.sizeof_data))
+        self.iq = scipy.fromfile(self.hfile, dtype=self.datatype, count=self.block_length)
+        #print "Read in %d items" % len(self.iq)
+        if(len(self.iq) == 0):
+            print "End of File"
+        else:
+            self.reals = [r.real for r in self.iq]
+            self.imags = [i.imag for i in self.iq]
+            self.time = [i*(1/self.sample_rate) for i in range(len(self.reals))]
+            
+    def make_plots(self):
+        # if specified on the command-line, set file pointer
+        self.hfile.seek(self.sizeof_data*self.start, 1)
+
+        self.get_data()
+        
+        # Subplot for real and imaginary parts of signal
+        self.sp_iq = self.fig.add_subplot(2,1,1, position=[0.075, 0.14, 0.85, 0.67])
+        self.sp_iq.set_title(("I&Q"), fontsize=self.title_font_size, fontweight="bold")
+        self.sp_iq.set_xlabel("Time (s)", fontsize=self.label_font_size, fontweight="bold")
+        self.sp_iq.set_ylabel("Amplitude (V)", fontsize=self.label_font_size, fontweight="bold")
+        self.plot_iq = plot(self.time, self.reals, 'bo-', self.time, self.imags, 'ro-')
+        self.sp_iq.set_ylim([1.5*min([min(self.reals), min(self.imags)]),
+                             1.5*max([max(self.reals), max(self.imags)])])
+        
+        draw()
+
+    def update_plots(self):
+        self.plot_iq[0].set_data([self.time, self.reals])
+        self.plot_iq[1].set_data([self.time, self.imags])
+        self.sp_iq.set_ylim([1.5*min([min(self.reals), min(self.imags)]),
+                             1.5*max([max(self.reals), max(self.imags)])])
+        draw()
+        
+    def click(self, event):
+        forward_valid_keys = [" ", "down", "right"]
+        backward_valid_keys = ["up", "left"]
+
+        if(find(event.key, forward_valid_keys)):
+            self.step_forward()
+            
+        elif(find(event.key, backward_valid_keys)):
+            self.step_backward()
+
+    def button_left_click(self, event):
+        self.step_backward()
+
+    def button_right_click(self, event):
+        self.step_forward()
+
+    def step_forward(self):
+        self.get_data()
+        self.update_plots()
+
+    def step_backward(self):
+        # Step back in file position
+        if(self.hfile.tell() >= 2*self.sizeof_data*self.block_length ):
+            self.hfile.seek(-2*self.sizeof_data*self.block_length, 1)
+        else:
+            self.hfile.seek(-self.hfile.tell(),1)
+        self.get_data()
+        self.update_plots()
+        
+
+def find(item_in, list_search):
+    try:
+	return list_search.index(item_in) != None
+    except ValueError:
+	return False
+	
+def main():
+    usage="%prog: [options] input_filename"
+    description = "Takes a GNU Radio complex binary file and displays the I&Q data versus time. You can set the block size to specify how many points to read in at a time and the start position in the file. By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples."
+
+    parser = OptionParser(conflict_handler="resolve", usage=usage, description=description)
+    parser.add_option("-B", "--block", type="int", default=1000,
+                      help="Specify the block size [default=%default]")
+    parser.add_option("-s", "--start", type="int", default=0,
+                      help="Specify where to start in the file [default=%default]")
+    parser.add_option("-R", "--sample-rate", type="float", default=1.0,
+                      help="Set the sampler rate of the data [default=%default]")
+    
+    (options, args) = parser.parse_args ()
+    if len(args) != 1:
+        parser.print_help()
+        raise SystemExit, 1
+    filename = args[0]
+
+    dc = draw_fft(filename, options)
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        pass
+    
+
+
diff --git a/gr-utils/src/python/gr_plot_short.py b/gr-utils/src/python/gr_plot_short.py
new file mode 100755
index 000000000..3466e0b7d
--- /dev/null
+++ b/gr-utils/src/python/gr_plot_short.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+#
+# Copyright 2007,2008 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+try:
+    import scipy
+except ImportError:
+    print "Please install SciPy to run this script (http://www.scipy.org/)"
+    raise SystemExit, 1
+
+from optparse import OptionParser
+from gnuradio.plot_data import plot_data
+
+def main():
+    usage="%prog: [options] input_filenames"
+    description = "Takes a GNU Radio short integer binary file and displays the samples versus time. You can set the block size to specify how many points to read in at a time and the start position in the file. By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples."
+
+    parser = OptionParser(conflict_handler="resolve", usage=usage, description=description)
+    parser.add_option("-B", "--block", type="int", default=1000,
+                      help="Specify the block size [default=%default]")
+    parser.add_option("-s", "--start", type="int", default=0,
+                      help="Specify where to start in the file [default=%default]")
+    parser.add_option("-R", "--sample-rate", type="float", default=1.0,
+                      help="Set the sampler rate of the data [default=%default]")
+    
+    (options, args) = parser.parse_args ()
+    if len(args) < 1:
+        parser.print_help()
+        raise SystemExit, 1
+    filenames = args
+
+    datatype=scipy.int16
+    dc = plot_data(datatype, filenames, options)
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        pass
+    
diff --git a/gr-utils/src/python/plot_data.py b/gr-utils/src/python/plot_data.py
new file mode 100644
index 000000000..7c79e1714
--- /dev/null
+++ b/gr-utils/src/python/plot_data.py
@@ -0,0 +1,168 @@
+#
+# Copyright 2007,2008 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+try:
+    import scipy
+except ImportError:
+    print "Please install SciPy to run this script (http://www.scipy.org/)"
+    raise SystemExit, 1
+
+try:
+    from pylab import *
+except ImportError:
+    print "Please install Matplotlib to run this script (http://matplotlib.sourceforge.net/)"
+    raise SystemExit, 1
+
+from optparse import OptionParser
+
+matplotlib.interactive(True)
+matplotlib.use('TkAgg')
+
+class plot_data:
+    def __init__(self, datatype, filenames, options):
+        self.hfile = list()
+        self.legend_text = list()
+        for f in filenames:
+            self.hfile.append(open(f, "r"))
+            self.legend_text.append(f)
+
+        self.block_length = options.block
+        self.start = options.start
+        self.sample_rate = options.sample_rate
+
+        self.datatype = datatype
+        self.sizeof_data = datatype().nbytes    # number of bytes per sample in file
+
+        self.axis_font_size = 16
+        self.label_font_size = 18
+        self.title_font_size = 20
+        self.text_size = 22
+
+        # Setup PLOT
+        self.fig = figure(1, figsize=(16, 9), facecolor='w')
+        rcParams['xtick.labelsize'] = self.axis_font_size
+        rcParams['ytick.labelsize'] = self.axis_font_size
+        
+        self.text_file_pos = figtext(0.10, 0.88, "File Position: ", weight="heavy", size=self.text_size)
+        self.text_block    = figtext(0.40, 0.88, ("Block Size: %d" % self.block_length),
+                                     weight="heavy", size=self.text_size)
+        self.text_sr       = figtext(0.60, 0.88, ("Sample Rate: %.2f" % self.sample_rate),
+                                     weight="heavy", size=self.text_size)
+        self.make_plots()
+
+        self.button_left_axes = self.fig.add_axes([0.45, 0.01, 0.05, 0.05], frameon=True)
+        self.button_left = Button(self.button_left_axes, "<")
+        self.button_left_callback = self.button_left.on_clicked(self.button_left_click)
+
+        self.button_right_axes = self.fig.add_axes([0.50, 0.01, 0.05, 0.05], frameon=True)
+        self.button_right = Button(self.button_right_axes, ">")
+        self.button_right_callback = self.button_right.on_clicked(self.button_right_click)
+
+        self.xlim = self.sp_f.get_xlim()
+
+        self.manager = get_current_fig_manager()
+        connect('key_press_event', self.click)
+        show()
+        
+    def get_data(self, hfile):
+        self.text_file_pos.set_text("File Position: %d" % (hfile.tell()//self.sizeof_data))
+        f = scipy.fromfile(hfile, dtype=self.datatype, count=self.block_length)
+        #print "Read in %d items" % len(self.f)
+        if(len(f) == 0):
+            print "End of File"
+        else:
+            self.f = f
+            self.time = [i*(1/self.sample_rate) for i in range(len(self.f))]
+        
+    def make_plots(self):
+        self.sp_f = self.fig.add_subplot(2,1,1, position=[0.075, 0.2, 0.875, 0.6])
+        self.sp_f.set_title(("Amplitude"), fontsize=self.title_font_size, fontweight="bold")
+        self.sp_f.set_xlabel("Time (s)", fontsize=self.label_font_size, fontweight="bold")
+        self.sp_f.set_ylabel("Amplitude (V)", fontsize=self.label_font_size, fontweight="bold")
+        self.plot_f = list()
+
+        maxval = -1e12
+        minval = 1e12
+
+        for hf in self.hfile:
+            # if specified on the command-line, set file pointer
+            hf.seek(self.sizeof_data*self.start, 1)
+
+            self.get_data(hf)
+        
+            # Subplot for real and imaginary parts of signal
+            self.plot_f += plot(self.time, self.f, 'o-')
+            maxval = max(maxval, max(self.f))
+            minval = min(minval, min(self.f))
+
+        self.sp_f.set_ylim([1.5*minval, 1.5*maxval])
+
+        self.leg = self.sp_f.legend(self.plot_f, self.legend_text)
+
+        draw()
+
+    def update_plots(self):
+        maxval = -1e12
+        minval = 1e12
+        for hf,p in zip(self.hfile,self.plot_f):
+            self.get_data(hf)
+            p.set_data([self.time, self.f])
+            maxval = max(maxval, max(self.f))
+            minval = min(minval, min(self.f))
+
+        self.sp_f.set_ylim([1.5*minval, 1.5*maxval])
+        
+        draw()
+        
+    def click(self, event):
+        forward_valid_keys = [" ", "down", "right"]
+        backward_valid_keys = ["up", "left"]
+
+        if(find(event.key, forward_valid_keys)):
+            self.step_forward()
+            
+        elif(find(event.key, backward_valid_keys)):
+            self.step_backward()
+
+    def button_left_click(self, event):
+        self.step_backward()
+
+    def button_right_click(self, event):
+        self.step_forward()
+
+    def step_forward(self):
+        self.update_plots()
+
+    def step_backward(self):
+        for hf in self.hfile:
+            # Step back in file position
+            if(hf.tell() >= 2*self.sizeof_data*self.block_length ):
+                hf.seek(-2*self.sizeof_data*self.block_length, 1)
+            else:
+                hf.seek(-hf.tell(),1)
+        self.update_plots()
+        
+
+def find(item_in, list_search):
+    try:
+	return list_search.index(item_in) != None
+    except ValueError:
+	return False