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(PECL stats >= 1.0.0)

stats_cdf_cauchyCalculates any one parameter of the Cauchy distribution given values for the others


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

Returns the cumulative distribution function, its inverse, or one of its parameters, of the Cauchy 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, x0, and gamma denotes cumulative distribution function, the value of the random variable, the location and the scale parameter of the Cauchy distribution, respectively.

Return value and parameters
which Return value par1 par2 par3
1 CDF x x0 gamma
2 x CDF x0 gamma
3 x0 x CDF gamma
4 gamma x CDF x0



The first parameter


The second parameter


The third parameter


The flag to determine what to be calculated

Return Values

Returns CDF, x, x0, or gamma, determined by which.

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