1 files changed, 44 insertions, 2 deletions
diff --git a/help/en_US/rc2poly.xml b/help/en_US/rc2poly.xml
index f8c66a4..a2f2993 100644
--- a/help/en_US/rc2poly.xml
+++ b/help/en_US/rc2poly.xml
@@ -3,7 +3,11 @@
 <!--
  *
  * This help file was generated from rc2poly.sci using help_from_sci().
- *
+ *kr: Refelection coefficient.
+// R0: the zero lag autocorrelation, R0.
+// a: Return the prediction polynomial.
+// efinal: Return the final prediction error.
+
  -->
 
 <refentry version="5.0-subset Scilab" xml:id="rc2poly" xml:lang="en"
@@ -17,7 +21,7 @@
 
   <refnamediv>
     <refname>rc2poly</refname>
-    <refpurpose></refpurpose>
+    <refpurpose>Convert reflection coefficients to prediction filter polynomial</refpurpose>
   </refnamediv>
 
 
@@ -28,4 +32,42 @@
    [a, efinal] = rc2poly(kr,R0)
    </synopsis>
 </refsynopsisdiv>
+
+<refsection>
+   <title>Parameters</title>
+   <variablelist>
+   <varlistentry><term>kr:</term>
+      <listitem><para>Reflection coefficients.</para></listitem></varlistentry>
+   <varlistentry><term>R0:</term>
+      <listitem><para>The zero-lag autocorrelation.</para></listitem></varlistentry>
+   <varlistentry><term>a:</term>
+      <listitem><para>Prediciton polynomial.</para></listitem></varlistentry>
+
+<varlistentry><term>efinal:</term>
+      <listitem><para>the final prediction error.</para></listitem></varlistentry>
+</variablelist>
+</refsection>
+
+<refsection>
+<title>Description</title>
+<para>a = rc2poly(k) converts the reflection coefficients k corresponding to the lattice structure to the prediction filter polynomial a, with a(1) = 1.</para>
+<para>The output a is row vector of length length(k) + 1.</para>
+
+<para>[a,efinal] = rc2poly(k,r0) returns the final prediction error efinal based on the zero-lag autocorrelation, r0.</para>
+</refsection>
+
+
+<refsection>
+<title>Example</title>
+ <programlisting role="example"><![CDATA[
+k = [0.3090 0.9800 0.0031 0.0082 -0.0082];
+a = rc2poly(k)
+//EXPECTED OUTPUT:a= 1.    0.6148162    0.9898814    0.0000243    0.0031580     - 0.0082
+   ]]></programlisting>
+
+
+</refsection>
+
+
+
 </refentry>