First, thanks for your development activities in datamash - it's an impressive package.
I was wanting to use the perc option to create credibility intervals, but it seems that function only accepts an integer argument so perc:5 and perc:95 give me a 90% credible interval, but I cant get a 95% credible interval as I can't use perc:2.5 and perc:97.5
Regards Dorian