?? linearly_interpolated_generator.c
字號(hào):
/* ranl.c - linearly interpolated random generator of period D */double ran(); /* uniform generator */void cdelay2(); /* circular delay */double ranl(D, u, q, iseed) /* usage: y = ranl(D, u, &q, &iseed); */int D, *q; /* \(q\) is cycled modulo-\(D\) */double *u; /* \(u\) = 2-dimensional array */long *iseed; /* \(q\), iseed are passed by address */{ double y; int i; i = (D - *q) % D; /* interpolation index */ y = u[0] + (u[1] - u[0]) * i / D; /* linear interpolation */ cdelay2(D-1, q); /* decrement \(q\) and wrap mod-\(D\) */ if (*q == 0) { /* every \(D\) calls, */ u[0] = u[1]; /* set new \(u[0]\) and */ u[1] = ran(iseed) - 0.5; /* get new \(u[1]\) (zero mean) */ } return y;}
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