IGamma

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IGamma is a numeric built-in function whose purpose is to compute the Lower Incomplete Beta function of two real valued arguments.

 \gamma(s,x) = \int_0^x t^{s-1}\,e^{-t}\,{\rm d}t .\,\!


Contents

Syntax

 IGamma (a,x);

Functionality

If a, x are positive real numbers
Number 
then the function computes the incomplete gamma function of the arguments.

Examples

Argument Type Input Result
Numeric
IGamma(3,4)
0.761897

Notes

Internally this function is implemented as three calls to the Gamma function.

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