data aa;
input id class$ x y;
cards;
1 a 310 0.035
2 a 1915 0.054
3 a 949 0.068
4 b 2573 0.76
5 b 3389 0.037
6 b 1470 0.074
;
run;
proc sort data=aa;
by id;
run;
proc reg data=aa noprint;
by class;
model y=x;
output out=res p=pred;
run;
quit;
proc sgplot data=res;
series y=pred x=x/group=class;
scatter y=pred x=x/group=class;
run;