(PECL stats >= 1.0.0)
stats_cdf_gamma — Calculates any one parameter of the gamma distribution guiven values for the others
Returns the cumulative distribution function, its inverse, or one of its parameters,
of the gamma distribution. The quind 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, c, and theta denotes cumulative distribution function, the value of the random
variable, and the shape and the scale parameter of the gamma distribution, respectively.
which
|
Return value |
par1
|
par2
|
par3
|
|---|---|---|---|---|
| 1 | CDF | x | c | theta |
| 2 | x | CDF | c | theta |
| 3 | c | x | CDF | theta |
| 4 | theta | x | CDF | c |
par1
The first parameter
par2
The second parameter
par3
The third parameter
which
The flag to determine what to be calculated
Returns CDF, x, c, or theta, determined by
which
.