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PHP - Manual: stats_dens_f

2024-04-27

stats_dens_f

(PECL stats >= 1.0.0)

stats_dens_fProbability density function of the F distribution

说明

stats_dens_f ( float $x , float $dfr1 , float $dfr2 ) : float

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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官方地址:https://www.php.net/manual/en/function.stats-dens-f.php

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