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Creating the inverse gamma distribution in IRIS requires the mean and standard deviation to be defined as inputs:

I suggest to add new syntax:

https://en.wikipedia.org/wiki/Inverse-gamma_distribution

`F = logdist.invgamma(MEAN,STD)`

This limits the shape parameter alpha to be greater than two. I suggest to add new syntax:

`F = logdist.invgamma(NaN,NaN,A,B)`

where A and B are shape and scale parameters (any positive numbers). https://en.wikipedia.org/wiki/Inverse-gamma_distribution

## comments

ikarib wrote Oct 7, 2016 at 7:48 AM

ikarib wrote Oct 13, 2016 at 7:46 AM

ikarib wrote Feb 15 at 7:01 PM

F = logdist.invgamma(NaN,NaN,A,B)