(PECL stats >= 1.0.0)

stats_cdf_logisticCalculates any one parameter of the logistic distribution given values for the others


stats_cdf_logistic ( float $par1 , float $par2 , float $par3 , int $which ) : float

Returns the cumulative distribution function, its inverse, or one of its parameters, of the logistic 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, mu, and s denotes cumulative distribution function, the value of the random variable, and the location and the scale parameter of the logistic distribution, respectively.

Return value and parameters
which Return value par1 par2 par3
1 CDF x mu s
2 x CDF mu s
3 mu x CDF s
4 s x CDF mu



The first parameter


The second parameter


The third parameter


The flag to determine what to be calculated


Returns CDF, x, mu, or s, determined by which.

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