(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
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 |
par1
The first parameter
par2
The second parameter
par3
The third parameter
which
The flag to determine what to be calculated
Returns CDF, x, k, or lambda, determined by which
.