stats_cdf_gamma

Calculates any one parameter of the gamma distribution given values for the others

&reftitle.description; `float` `stats_cdf_gamma` `float` `par1` `float` `par2` `float` `par3` `int` `which`

Returns the cumulative distribution function, its inverse, or one of its parameters, of the gamma 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 theta denotes cumulative distribution function, the value of the random variable, and the shape and the scale parameter of the gamma distribution, respectively.

## Return value and parameters

`which` | Return value | `par1` | `par2` | `par3`
1 | CDF | x | k | theta
2 | x | CDF | k | theta
3 | k | x | CDF | theta
4 | theta | x | CDF | k

&reftitle.parameters;

`par1`

- The first parameter

`par2`

- The second parameter

`par3`

- The third parameter

`which`

- The flag to determine what to be calculated

&reftitle.returnvalues;

Returns CDF, x, k, or theta, determined by `which`.