(PECL stats >= 1.0.0)
stats_cdf_f — Calculates any one parameter of the F distribution guiven values for the others
Returns the cumulative distribution function, its inverse, or one of its parameters,
of the F 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, d1, and d2 denotes cumulative distribution function, the value of the random
variable, and the degree of freedoms of the F distribution, respectively.
which
|
Return value |
par1
|
par2
|
par3
|
|---|---|---|---|---|
| 1 | CDF | x | d1 | d2 |
| 2 | x | CDF | d1 | d2 |
| 3 | d1 | x | CDF | d2 |
| 4 | d2 | x | CDF | d1 |
par1
The first parameter
par2
The second parameter
par3
The third parameter
which
The flag to determine what to be calculated
Returns CDF, x, d1, or d2, determined by
which
.