/* nag_rngs_exp_mix (g05lqc) Example Program. * * Copyright 2001 Numerical Algorithms Group. * * Mark 7, 2001. */ #include #include #include #include int main(void) { /* Scalars */ Integer igen, j, m, nmix; Integer exit_status = 0; NagError fail; /* Arrays */ double *a = 0, *wgt = 0, *x = 0; Integer iseed[4]; INIT_FAIL(fail); printf("nag_rngs_exp_mix (g05lqc) Example Program Results\n\n"); m = 5; nmix = 3; /* Allocate memory */ if (!(a = NAG_ALLOC(nmix, double)) || !(wgt = NAG_ALLOC(nmix, double)) || !(x = NAG_ALLOC(m, double))) { printf("Allocation failure\n"); exit_status = -1; goto END; } /* Initialise the seed to a repeatable sequence */ iseed[0] = 1762543; iseed[1] = 9324783; iseed[2] = 42344; iseed[3] = 742355; /* igen identifies the stream. */ igen = 1; /* nag_rngs_init_repeatable (g05kbc). * Initialize seeds of a given generator for random number * generating functions (that pass seeds explicitly) to give * a repeatable sequence */ nag_rngs_init_repeatable(&igen, iseed); a[0] = 1.0; a[1] = 5.0; a[2] = 2.0; wgt[0] = 0.5; wgt[1] = 0.3; wgt[2] = 0.2; /* nag_rngs_exp_mix (g05lqc). * Generates a vector of random numbers from an exponential * mixture distribution, seeds and generator number passed * explicitly */ nag_rngs_exp_mix(nmix, a, wgt, m, x, igen, iseed, &fail); if (fail.code != NE_NOERROR) { printf("Error from nag_rngs_exp_mix (g05lqc).\n%s\n", fail.message); exit_status = 1; goto END; } for (j = 0; j < m; ++j) { printf("%10.4f\n", x[j]); } END: if (a) NAG_FREE(a); if (wgt) NAG_FREE(wgt); if (x) NAG_FREE(x); return exit_status; }