(PECL stats >= 1.0.0)
stats_cdf_beta — Calculates any one parameter of the beta distribution given values for the others
$par1
, float $par2
, float $par3
, int $which
) : float
Returns the cumulative distribution function, its inverse, or one of its parameters,
of the beta 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, alpha, and beta denotes cumurative distribution function, the value of the random
variable, and shape parameters of the beta distribution, respectively.
which |
Return value | par1 |
par2 |
par3 |
---|---|---|---|---|
1 | CDF | x | alpha | beta |
2 | x | CDF | alpha | beta |
3 | alpha | x | CDF | beta |
4 | beta | x | CDF | alpha |
par1
The first parameter
par2
The second parameter
par3
The third parameter
which
The flag to determine what to be calculated
Returns CDF, x, alpha, or beta, determined by which
.