Contents

typedef double dtype;
typedef double rtype;
#define cT  numo_cDFloat
#define cRT numo_cDFloat
#define mTM numo_mDFloatMath

#include "float_macro.h"

/* generates a random number on [0,1)-real-interval */
inline static dtype m_rand(dtype max)
{
    return genrand_res53_mix() * max;
}

/* generates random numbers from the normal distribution
   using Box-Muller Transformation.
 */
inline static void m_rand_norm(dtype mu, dtype sigma, dtype *a0, dtype *a1)
{
    dtype x1, x2, w;
    do {
	x1 = genrand_res53_mix();
	x1 = x1*2-1;
	x2 = genrand_res53_mix();
	x2 = x2*2-1;
	w = x1 * x1 + x2 * x2;
    } while (w>=1);
    w = sqrt( (-2*log(w)) / w );
    if (a0) {*a0 = x1*w * sigma + mu;}
    if (a1) {*a1 = x2*w * sigma + mu;}
}

#define m_min_init numo_dfloat_new_dim0(0.0/0.0)
#define m_max_init numo_dfloat_new_dim0(0.0/0.0)
#define m_extract(x) rb_float_new(*(double*)x)
#define m_nearly_eq(x,y) (fabs(x-y)<=(fabs(x)+fabs(y))*DBL_EPSILON*2)

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
numo-narray-0.9.0.6	ext/numo/narray/numo/types/dfloat.h
numo-narray-0.9.0.5	ext/numo/narray/numo/types/dfloat.h
numo-narray-0.9.0.4	ext/numo/narray/numo/types/dfloat.h