stats_dens_f
(PECL stats >= 1.0.0)
stats_dens_f — Probability density function of the F distribution
说明
Returns the probability density at x, where the
random variable follows the F distribution of which the degree of freedoms
are dfr1 and dfr2.
参数
-
x -
The value at which the probability density is calculated
-
dfr1 -
The degree of freedom of the distribution
-
dfr2 -
The degree of freedom of the distribution
返回值
The probability density at x or false for failure.
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