stats_cdf_noncentral_chisquare
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
float stats_cdf_noncentral_chisquare ( float $par1 , float $par2 , float $par3 , int $which )
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 cumurative 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.
← stats_cdf_negative_binomial
stats_cdf_noncentral_f →
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https://secure.php.net/manual/en/function.stats-cdf-noncentral-chisquare.php
