1# angel42102209

I am not sure what you want exactly and hope the following example would solve your problem.

HTH

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data t1;
  length group $1;
   do i = 1 to 50;
     c=mod(i,3);
     if c=0 then group='A';
     else if c=1 then group='B';
     else              group='C';
     if Group='A' then y=1+rannor(8897);
     else if Group='B' then y=2+rannor(8897);
     else y=3+rannor(8897);
     output;
    end;
run;

proc glm data=t1;
class group;
  model y=group/noint solution;
  estimate 'group of a=b' group 1 -1 0;
  estimate 'group of a=c' group 1 0 -1;
  estimate 'group of b=c' group 0 1 -1;

run;
quit;;