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author | shamikam | 2017-11-07 15:59:48 +0530 |
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committer | shamikam | 2017-11-07 15:59:48 +0530 |
commit | c0c0582462720ed597b00e116506570577614e89 (patch) | |
tree | 31dedd23698e5357b19c810b7d7a8464100ef44a /help/en_US/arburg.xml | |
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diff --git a/help/en_US/arburg.xml b/help/en_US/arburg.xml new file mode 100644 index 0000000..75648ba --- /dev/null +++ b/help/en_US/arburg.xml @@ -0,0 +1,69 @@ +<?xml version="1.0" encoding="UTF-8"?> + +<!-- + * + * This help file was generated from arburg.sci using help_from_sci(). + * + --> + +<refentry version="5.0-subset Scilab" xml:id="arburg" xml:lang="en" + xmlns="http://docbook.org/ns/docbook" + xmlns:xlink="http://www.w3.org/1999/xlink" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns:ns3="http://www.w3.org/1999/xhtml" + xmlns:mml="http://www.w3.org/1998/Math/MathML" + xmlns:scilab="http://www.scilab.org" + xmlns:db="http://docbook.org/ns/docbook"> + + <refnamediv> + <refname>arburg</refname> + <refpurpose>This function calculates coefficients of an autoregressive (AR) model of complex data.</refpurpose> + </refnamediv> + + +<refsynopsisdiv> + <title>Calling Sequence</title> + <synopsis> + a = arburg(x, poles) + a = arburg(x, poles, criterion) + [a, v] = arburg(...) + [a, v, k] = arburg(...) + </synopsis> +</refsynopsisdiv> + +<refsection> + <title>Parameters</title> + <variablelist> + <varlistentry><term>x:</term> + <listitem><para> vector of real or complex numbers, of length > 2</para></listitem></varlistentry> + <varlistentry><term>poles:</term> + <listitem><para> positive integer value < length(x) - 2</para></listitem></varlistentry> + <varlistentry><term>criterion:</term> + <listitem><para> string value, takes in "AKICc", "KIC", "AICc", "AIC" and "FPE", default it not using a model-selection criterion</para></listitem></varlistentry> + <varlistentry><term>a, v, k:</term> + <listitem><para> Output variables</para></listitem></varlistentry> + </variablelist> +</refsection> + +<refsection> + <title>Description</title> + <para> +This is an Octave function. +This function calculates coefficients of an autoregressive (AR) model of complex data x using the whitening lattice-filter method of Burg. +The first argument is the data sampled. The second argument is the number of poles in the model (or limit in case a criterion is supplied). +The third parameter takes in the criterion to limit the number of poles. The acceptable values are "AIC", "AKICc", "KIC", "AICc" which are based on information theory. +Output variable a is a list of P+1 autoregression coefficients. +Output variable v is the mean square of residual noise from the whitening operation of the Burg lattice filter. +Output variable k corresponds to the reflection coefficients defining the lattice-filter embodiment of the model. +</para> +</refsection> + +<refsection> + <title>Examples</title> + <programlisting role="example"><![CDATA[ +arburg([1,2,3,4,5],2) +ans = +1.00000 -1.86391 0.95710 + ]]></programlisting> +</refsection> +</refentry> |