Special |
Returns the inverse P^(-1) of the regularized lower incomplete gamma function
P(a,x) = 1/Gamma(a) * int(exp(-t)t^(a-1),t=0..x) for real a > 0, x > 0,
such that P^(-1)(a,P(a,x)) == x.
Namespace: Altaxo.Calc
Assembly: AltaxoCore (in AltaxoCore.dll) Version: 4.8.3572.0 (4.8.3572.0)
SyntaxC#
public static double GammaLowerRegularizedInv( double a, double y0 )
Parameters
- a Double
- Parameter a of the regularized lower incomplete gamma (must be > 0).
- y0 Double
- Target value of P(a,x) for which the inverse is sought (in [0,1]).
Return Value
DoubleThe value x such that P(a,x) = y0, or NaN if inputs are NaN.
See Also