LRunif.c

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/*
 * Copyright    2019    R.K. Owen, Ph.D.
 * License      see lgpl.md (Gnu Lesser General Public License)
 */
#ifdef __cplusplus
extern "C" {
#endif

#include "libran.h"

double LRd_unif_RAN(LR_obj *o) {
        double x, diff = (o->b.d - o->a.d); 
        x = o->ud(o);

        return o->a.d + x * diff;
}

double LRd_unif_PDF(LR_obj *o, double x) {
        double diff = (o->b.d - o->a.d); 

        if (x < o->a.d || x >= o->b.d) {
                return 0.0;
        } else {
                return 1.0 / diff;
        }
}

double LRd_unif_CDF(LR_obj *o, double x) {
        double diff = (o->b.d - o->a.d); 

        if (x < o->a.d) {
                return 0.0;
        } else if (x >= o->b.d) {
                return 1.0;
        } else {
                return (x - o->a.d) / diff;
        }
}

float LRf_unif_RAN(LR_obj *o) {
        float x, diff = (o->b.f - o->a.f); 
        x = o->uf(o);

        return o->a.f + x * diff;
}

float LRf_unif_PDF(LR_obj *o, float x) {
        float diff = (o->b.f - o->a.f); 

        if (x < o->a.f || x >= o->b.f) {
                return 0.0;
        } else {
                return 1.0 / diff;
        }
}

float LRf_unif_CDF(LR_obj *o, float x) {
        float diff = (o->b.f - o->a.f); 

        if (x < o->a.f) {
                return 0.0;
        } else if (x >= o->b.f) {
                return 1.0;
        } else {
                return (x - o->a.f) / diff;
        }
}

#ifdef __cplusplus
}
#endif