stats_cdf_noncentral_chisquare
(PECL stats >= 1.0.0)
stats_cdf_noncentral_chisquare — Calculates any one parameter of the non-central chi-square distribution given values for the others
Description
stats_cdf_noncentral_chisquare ( float $par1 , float $par2 , float $par3 , int $which ) : float
Returns the cumulative distribution function, its inverse, or one of its parameters, of the non-central chi-square 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, k, and lambda denotes cumulative distribution function, the value of the random variable, the degree of freedom and the non-centrality parameter of the distribution, respectively.
which | Return value | par1 | par2 | par3 |
|---|---|---|---|---|
| 1 | CDF | x | k | lambda |
| 2 | x | CDF | k | lambda |
| 3 | k | x | CDF | lambda |
| 4 | lambda | x | CDF | k |
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, k, or lambda, determined by which.
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https://www.php.net/manual/en/function.stats-cdf-noncentral-chisquare.php