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PHP stats_cdf_beta

PHP original manual for stats_cdf_beta [ show | php.net ]

stats_cdf_beta

(PECL stats >= 1.0.0)

stats_cdf_beta — Calculates any one parameter of the beta distribution given values for the others

Description

float stats_cdf_beta ( float $par1 , float $par2 , float $par3 , int $which )

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

The following table lists the return value and parameters by which. CDF, x, alpha, and beta denotes cumurative distribution function, the value of the random variable, and shape parameters of the beta distribution, respectively.

Return value and parameters
which Return value par1 par2 par3
1 CDF x alpha beta
2 x CDF alpha beta
3 alpha x CDF beta
4 beta x CDF alpha

Parameters

par1

The first parameter

par2

The second parameter

par3

The third parameter

which

The flag to determine what to be calculated

Return Values

Returns CDF, x, alpha, or beta, determined by which.