📄 gran_c.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, =
&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 < 12; i++) /* sum 12 uniform random =
numbers */
v +=3D ran(iseed);
return s * (v - 6) + m; /* adjust mean and variance */
}
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