International PHP Conference 2019 - Spring Edition


(PECL stats >= 1.0.0)

stats_cdf_noncentral_fCalculates any one parameter of the non-central F distribution given values for the others


float stats_cdf_noncentral_f ( float $par1 , float $par2 , float $par3 , float $par4 , int $which )

Returns the cumulative distribution function, its inverse, or one of its parameters, of the non-central F distribution. The kind of the return value and parameters (par1, par2, par3, and par4) are determined by which.

The following table lists the return value and parameters by which. CDF, x, nu1, nu2, and lambda denotes cumurative distribution function, the value of the random variable, the degree of freedoms and the non-centrality parameter of the distribution, respectively.

Return value and parameters
which Return value par1 par2 par3 par4
1 CDF x nu1 nu2 lambda
2 x CDF nu1 nu2 lambda
3 nu1 x CDF nu2 lambda
4 nu2 x CDF nu1 lambda
5 lambda x CDF nu1 nu2



The first parameter


The second parameter


The third parameter


The fourth parameter


The flag to determine what to be calculated


Returns CDF, x, nu1, nu2, or lambda, determined by which.

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