Dear All, What I want is change following data > data alc status age freq 1 0 0 0 408 2 1 0 0 64 3 0 1 0 26 4 1 1 0 30 5 0 0 1 258 6 1 0 1 45 7 0 1 1 78 8 1 1 1 66 To this table. age =0 alc 0 1 status 0 408 64 1 26 30 age =1 alc 0 1 status 0 258 45 1 78 66 How can I do that? Thanks,