Hi
Gamma and Inverse-Gamma are different distributions. To my understanding Excel does not support the inverse gamma distribution.
If you're looking for the inverse CDF of the gamma distribution though (Excel: GAMMAINV), I've just added Gamma.InvCDF that will be part of the next alpha release and should work as expected (but again parametrized with rate instead of scale when using the static functions).
Since there have been quite a few Excel-related queries I've also added a new static
Thanks,
Christoph
Gamma and Inverse-Gamma are different distributions. To my understanding Excel does not support the inverse gamma distribution.
If you're looking for the inverse CDF of the gamma distribution though (Excel: GAMMAINV), I've just added Gamma.InvCDF that will be part of the next alpha release and should work as expected (but again parametrized with rate instead of scale when using the static functions).
Since there have been quite a few Excel-related queries I've also added a new static
ExcelFunctions
class that provides Excel-compatible functions, e.g. ExcelFunctions.GAMMAINV
.Thanks,
Christoph