gran_c.mht

来自「常用的DSP算法集锦」· MHT 代码 · 共 35 行

MHT
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Date: Wed, 27 Sep 2006 22:48:21 +0800
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<BODY><PRE>/* gran.c - gaussian random number generator */

double ran();                            /* uniform generator */

double gran(m, s, iseed)                 /* usage: x =3D gran(m, s, =
&amp;iseed); */
double m, s;                             /* \(m\) =3D mean, \(s\sp{2}\) =
=3D variance */
long *iseed;                             /* iseed passed by address */
{
       double v =3D 0;
       int i;

       for (i =3D 0; i &lt; 12; i++)          /* sum 12 uniform random =
numbers */
              v +=3D ran(iseed);

       return s * (v - 6) + m;           /* adjust mean and variance */
}
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