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Diffstat (limited to 'help/en_US/idct1.xml')
| -rw-r--r-- | help/en_US/idct1.xml | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/help/en_US/idct1.xml b/help/en_US/idct1.xml index c43eb1c..7715570 100644 --- a/help/en_US/idct1.xml +++ b/help/en_US/idct1.xml @@ -17,7 +17,41 @@ <refnamediv> <refname>idct1</refname> - <refpurpose>funcprot(0);</refpurpose> + <refpurpose>Compute the inverse discrete cosine transform of input.</refpurpose> </refnamediv> + +<refsynopsisdiv> + <title>Calling Sequence</title> + <synopsis> + Y = idct1(X) + Y = idct1(X, N) + </synopsis> +</refsynopsisdiv> + +<refsection> + <title>Parameters</title> + <variablelist> + <varlistentry><term>X:</term> + <listitem><para> Matrix or integer</para></listitem></varlistentry> + <varlistentry><term>N:</term> + <listitem><para> If N is given, then X is padded or trimmed to length N before computing the transform.</para></listitem></varlistentry> + </variablelist> +</refsection> + +<refsection> + <title>Description</title> + <para> +This function computes the inverse discrete cosine transform of input X. If N is given, then X is padded or trimmed to length N before computing the transform. If X is a matrix, compute the transform along the columns of the the matrix. The transform is faster if X is real-valued and even length. +</para> +</refsection> + +<refsection> + <title>Examples</title> + <programlisting role="example"><![CDATA[ +idct1([1,3,6]) +ans = +5.1481604 - 4.3216292 0.9055197 + ]]></programlisting> +</refsection> </refentry> |