hi, I'm trying to do GxE interactions in PLINK. and mycov.dat file is formatted like this
FID IID Age BMI 1 subject 1 66 23.10 2 subject 2 76 25.30 3 subjet 3 32 24.90 5 subject 4 70 24.00
I had some suggestions to do cut off of BMI and code like 0/1 or 1/2 . I have tried both ways i.e, with binary and with continuous. but PLINK keeps giving me the same error "Can only use --gxe option with continuous phenotypes"
Can anyone help me with this? or if there is any other function in PLINK that I can use to do SNP-trait association interactions?