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floorgasm
2004 Apr 15
0
phyper accuracy and efficiency (PR#6772)
...}
return log_p ? log1pgnum (sum) : 1 + sum;
}
gnm_float
phyper (gnm_float i, gnm_float NR, gnm_float NB, gnm_float n, int lower_tail,
int log_p)
{
gnm_float d, pd;
#ifdef IEEE_754
if (isnangnum (i) || isnangnum (NR) || isnangnum (NB) || isnangnum (n))
return i + NR + NB + n;
#endif
i = floorgnum (i + 1e-7);
NR = floorgnum (NR + 0.5);
NB = floorgnum (NB + 0.5);
n = floorgnum (n + 0.5);
if (NR < 0 || NB < 0 || !finitegnum (NR + NB) || n < 0 || n > NR + NB)
ML_ERR_return_NAN;
if (i * (NR + NB) > n * NR) {
/* Swap tails. */
gnm_float oldNB = NB;
NB = NR;
NR = o...