data a;
input a b y;
datalines;
1 1 3.5
1 1 3.4
1 2 3.2
1 2 3.3
1 2 4.1
1 3 2.6
2 1 4.5
2 1 4.2
2 2 3.9
2 2 4.6
2 3 5.0
2 3 6.1
proc glm;
class a b;
model y=a b/e1 e2 e3;
run;
proc glm; class a b;
model y=a|b/e1 e2 e3;
run;