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Diffstat (limited to 'gr-utils/src/python/plot_data.py')
| -rw-r--r-- | gr-utils/src/python/plot_data.py | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/gr-utils/src/python/plot_data.py b/gr-utils/src/python/plot_data.py new file mode 100644 index 000000000..242ca2a4b --- /dev/null +++ b/gr-utils/src/python/plot_data.py @@ -0,0 +1,165 @@ +# +# Copyright 2007,2008,2011 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 + +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)) + try: + f = scipy.fromfile(hfile, dtype=self.datatype, count=self.block_length) + except MemoryError: + print "End of File" + else: + self.f = scipy.array(f) + self.time = scipy.array([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, self.f.max()) + minval = min(minval, self.f.min()) + + 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, self.f.max()) + minval = min(minval, self.f.min()) + + 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 |