code changes by Kartik Hegde during FOSSEE Fellowship 2018

1 files changed, 40 insertions, 1 deletions

diff --git a/help/en_US/armcov.xml b/help/en_US/armcov.xml
index 62e33b7..79ed57c 100644
--- a/help/en_US/armcov.xml
+++ b/help/en_US/armcov.xml
@@ -17,7 +17,46 @@
 
   <refnamediv>
     <refname>armcov</refname>
-    <refpurpose></refpurpose>
+    <refpurpose>This function uses the modified covariance method to fit a pth-order autoregressive (AR) model to the input signal x           </refpurpose>
   </refnamediv>
 
+<refsynopsisdiv>
+   <title>Calling Sequence</title>
+   <synopsis>
+   a=armcov(x,p)
+   [a,e] = armcov(x,p)
+   </synopsis>
+</refsynopsisdiv>
+
+<refsection>
+   <title>Parameters</title>
+   <variablelist>
+   <varlistentry><term>x:</term>
+      <listitem><para> input signal</para></listitem></varlistentry>
+   <varlistentry><term>p:</term>
+      <listitem><para> order</para></listitem></varlistentry>
+   <varlistentry><term>a:</term>
+      <listitem><para> output of an AR system driven by white noise</para></listitem></varlistentry>
+   <varlistentry><term>e:</term>
+      <listitem><para> variance estimate</para></listitem></varlistentry>
+   </variablelist>
+</refsection>
+
+<refsection>
+   <title>Description</title>
+   <para>
+This function uses the modified covariance method to fit a pth-order autoregressive (AR) model to the input signal x.
+</para>
+</refsection>
+
+<refsection>
+   <title>Examples</title>
+   <programlisting role="example"><![CDATA[
+A = [1 -2.7607 3.8106 -2.6535 0.9238];
+y = filter(1,A,0.2*rand(1024,1,"normal"));
+arcoeffs = armcov(y,4)
+
+   ]]></programlisting>
+
+</refsection>
 </refentry>