stats_dens_t
(PECL stats >= 1.0.0)
stats_dens_t — Probability density function of the t-distribution
说明
stats_dens_t (
float
$x
,
float $dfr
) :
float
Returns the probability density at x
, where the random variable follows the t-distribution of which the degree of freedom is dfr
.
参数
-
x
-
The value at which the probability density is calculated
-
dfr
-
The degree of freedom of the distribution
返回值
The probability density at x
or FALSE
for failure.