1 files changed, 1 insertions, 61 deletions
diff --git a/help/en_US/periodogram.xml b/help/en_US/periodogram.xml
index 5566e39..a214632 100644
--- a/help/en_US/periodogram.xml
+++ b/help/en_US/periodogram.xml
@@ -17,67 +17,7 @@
 
   <refnamediv>
     <refname>periodogram</refname>
-    <refpurpose>Return the periodogram (Power Spectral Density) of X</refpurpose>
+    <refpurpose>Calling Sequence:</refpurpose>
   </refnamediv>
 
-
-<refsynopsisdiv>
-   <title>Calling Sequence</title>
-   <synopsis>
-
-   [PXX, W] = periodogram (X, WIN, NFFT, FS)
-   [PXX, W] = periodogram (..., "RANGE")
-   </synopsis>
-</refsynopsisdiv>
-
-<refsection>
-   <title>Parameters</title>
-   <variablelist>
-   <varlistentry><term>X:</term>
-      <listitem><para>data vector.  If X is real-valued a one-sided spectrum is estimated. If X is complex-valued, or "RANGE" specifies "twosided", the full spectrum is estimated.</para></listitem></varlistentry>
-   <varlistentry><term>WIN:</term>
-      <listitem><para> window weight data.  If window is empty or unspecified a default rectangular window is used.  Otherwise, the window is applied to the signal ('X .* WIN') before computing th periodogram.  The window data must be a vector of the same length as X.</para></listitem></varlistentry>
-   <varlistentry><term>NFFT:</term>
-      <listitem><para>number of frequency bins.  The default is 256 or the next higher power of 2 greater than the length of X ('max (256,2.^nextpow2 (length (x)))').  If NFFT is greater than the length of the input then X will be zero-padded to the length of NFFT.</para></listitem></varlistentry>
-   <varlistentry><term>FS:</term>
-      <listitem><para>sampling rate.  The default is 1.</para></listitem></varlistentry>
-   <varlistentry><term>RANGE:</term>
-      <listitem><para>range of spectrum.  "onesided" computes spectrum from [0..nfft/2+1]."twosided" computes spectrum from [0..nfft-1].</para></listitem></varlistentry>
-   </variablelist>
-</refsection>
-
-<refsection>
-   <title>Description</title>
-   <para>
-The optional second output W are the normalized angular frequencies.  For a one-sided calculation W is in the range [0, pi]. If NFFT is even and [0, pi) if NFFT is odd.  Similarly, for a two-sided calculation W is in the range [0, 2*pi] or [0, 2*pi)depending on NFFT.
-   </para>
-   <para>
-If a sampling frequency is specified, FS, then the output frequencies F will be in the range [0, FS/2] or [0, FS/2) for one-sided calculations. For two-sided calculations the range will be [0, FS).
-   </para>
-
-</refsection>
-
-<refsection>
-   <title>Examples</title>
-   <programlisting role="example"><![CDATA[
-n=0:319;
-x=cos(%pi/4*n)+rand(size(n,"r"),"normal");
-[pxx,w]=periodogram(x,ones(1,320),256,2000,"onesided");
-plot2d(w,10*log10(pxx))
-xtitle('periodogram','frequency','magnitude(db)')
-xgrid()
-   ]]></programlisting>
-<scilab:image>
-n=0:319;
-x=cos(%pi/4*n)+rand(size(n,"r"),"normal");
-[pxx,w]=periodogram(x,ones(1,320),256,2000,"onesided");
-plot2d(w,10*log10(pxx))
-xtitle('periodogram','frequency','magnitude(db)')
-xgrid()
-</scilab:image>
-
-
-</refsection>
-
-
 </refentry>