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<refentry id="urd">
<indexterm id="IndexUrd"><primary>urd</primary></indexterm>
<refentryinfo><title>Signal Generators:Random (Noise) Generators</title></refentryinfo>
<refmeta>
<refentrytitle>urd</refentrytitle>
</refmeta>
<refnamediv>
<refname>urd</refname>
<refpurpose>
A discrete user-defined-distribution random generator that can be used as a function.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
A discrete user-defined-distribution random generator that can be used as a function.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>aout = <command>urd</command>(ktableNum)</synopsis>
<synopsis>iout = <command>urd</command>(itableNum)</synopsis>
<synopsis>kout = <command>urd</command>(ktableNum)</synopsis>
</refsect1>
<refsect1>
<title>Initialization</title>
<para>
<emphasis>itableNum</emphasis> -- number of table containing the random-distribution function. Such table is generated by the user. See <link linkend="GEN40">GEN40</link>, <link linkend="GEN41">GEN41</link>, and <link linkend="GEN42">GEN42</link>. The table length does not need to be a power of 2
</para>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>ktableNum</emphasis> -- number of table containing the random-distribution function. Such table is generated by the user. See <link linkend="GEN40">GEN40</link>, <link linkend="GEN41">GEN41</link>, and <link linkend="GEN42">GEN42</link>. The table length does not need to be a power of 2
</para>
<para>
<emphasis>urd</emphasis> is the same opcode as <link linkend="duserrnd"><citetitle>duserrnd</citetitle></link>, but can be used in function fashion.
</para>
<para>
For a tutorial about random distribution histograms and functions see:
<itemizedlist>
<listitem>
<para>
D. Lorrain. "A panoply of stochastic cannons". In C. Roads, ed. 1989. Music machine. Cambridge, Massachusetts: MIT press, pp. 351 - 379.
</para>
</listitem>
</itemizedlist>
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<link linkend="cuserrnd"><citetitle>cuserrnd</citetitle></link>,
<link linkend="duserrnd"><citetitle>duserrnd</citetitle></link>
</para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>Author: &namegabriel;</para>
<para>New in Version 4.16</para>
</refsect1>
</refentry>
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