php man page for stats_rand_gen_gamma

STATS_RAND_GEN_GAMMA(3) 						 1						   STATS_RAND_GEN_GAMMA(3)

stats_rand_gen_gamma - Generates random deviates from a gamma distribution

SYNOPSIS
       float stats_rand_gen_gamma (float  $a, float  $r)

DESCRIPTION
	Generates random deviates from the gamma distribution whose density is (A**R)/Gamma(R) * X**(R-1) * Exp(-A*X).

PARAMETERS
	      o $a
		- location parameter of Gamma distribution ($a > 0).

	      o $r
		- shape parameter of Gamma distribution ($r > 0).

RETURN VALUES
PHP Documentation Group 												   STATS_RAND_GEN_GAMMA(3)