gammapInv and gammapInva: Inverses of normalized gammap function
Usage
gammapInv(a, p)
gammapInva(x, p)
Arguments
- a
The numeric 'a' parameter in the upper
incomplete gamma
- p
The numeric 'p' parameter in the upper incomplete gamma
- x
The numeric 'x' parameter in the upper incomplete gamma
Value
inverse gammap results
Details
With the equation:
p = gammap(a, x)
The 'gammapInv' function returns a value 'x' that satisfies the
equation above
The 'gammapInva' function returns a value 'q' that satisfies the
equation above
NOTE: gammapInva is slow
Examples
gammapInv(1:3, 0.5)
#> [1] 0.6931472 1.6783470 2.6740603
gammapInv(1, 1:3 / 3.1)
#> [1] 0.3894648 1.0360919 3.4339872
gammapInv(1:3, 1:3 / 3.1)
#> [1] 0.3894648 2.1988984 6.8872929
gammapInva(1:3, 1:3 / 3.1)
#> [1] 0.3894648 2.1988984 6.8872929
