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<?xml version="1.0" encoding="UTF-8"?>
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<refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:svg="http://www.w3.org/2000/svg" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook" version="5.0-subset Scilab" xml:lang="en" xml:id="varn">
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<refname>varn</refname>
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<refpurpose> symbolic variable of a polynomial</refpurpose>
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<title>Calling Sequence</title>
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<synopsis>[symb]=varn(p)
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<title>Arguments</title>
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<para>polynomial (or polynomial matrix)</para>
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<para>character string</para>
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<para>polynomial or polynomial matrix</para>
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<para>symbolic variable (character string)</para>
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<para>polynomial (or polynomial matrix)</para>
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<title>Description</title>
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<literal>symb=varn(p)</literal> returns in <literal>symb</literal> the symbolic variable of the polynomial <literal>p</literal>
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(i.e. <literal>varn(poly(0,'x'))</literal> is <literal>'x'</literal>).
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<literal>varn(x,'s')</literal> returns a polynomial matrix with same coefficients
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as <literal>x</literal> but with <literal>'s'</literal> as symbolic variable (change of variable name).
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<title>Examples</title>
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<programlisting role="example"><![CDATA[
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<refname>varn</refname>
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<refpurpose> symbolic variable of a polynomial</refpurpose>
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<title>Calling Sequence</title>
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<synopsis>[symb]=varn(p)
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<title>Arguments</title>
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<para>polynomial (or polynomial matrix)</para>
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<para>character string</para>
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<para>polynomial or polynomial matrix</para>
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<para>symbolic variable (character string)</para>
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<para>polynomial (or polynomial matrix)</para>
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<title>Description</title>
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<literal>symb=varn(p)</literal> returns in <literal>symb</literal> the symbolic variable of the polynomial <literal>p</literal>
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(i.e. <literal>varn(poly(0,'x'))</literal> is <literal>'x'</literal>).
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<literal>varn(x,'s')</literal> returns a polynomial matrix with same coefficients
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as <literal>x</literal> but with <literal>'s'</literal> as symbolic variable (change of variable name).
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<title>Examples</title>
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<programlisting role="example"><![CDATA[
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s=poly(0,'s');p=[s^2+1,s];
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]]></programlisting>
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<refsection role="see also">
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<title>See Also</title>
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<simplelist type="inline">
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<link linkend="horner">horner</link>
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<link linkend="poly">poly</link>
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<refsection role="see also">
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<title>See Also</title>
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<simplelist type="inline">
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<link linkend="horner">horner</link>
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<link linkend="poly">poly</link>