10-23-2015 09:31 AM
I can't tell from your picture if this is count data or not. Is your response variable always an integer, or does it include values like 0.5 and 0.87321?
If that doesn't suffice, what kind of a permutation test are you looking for? What quantity are you comparing between groups?
10-23-2015 01:40 PM
You could start by testing if the proportion of zeros is the same across b groups:
data myData0; set myData; isZero = a=0; run; proc freq data=myData0; tables isZero*b / chisq; run;