data ramus;
input age1 age2 age3 age4;
lines;
47.8 48.8 49.0 49.7
46.4 47.3 47.7 48.4
46.3 46.8 47.8 48.5
45.1 45.3 46.1 47.2
47.6 48.5 48.9 49.3
52.5 53.2 53.3 53.7
51.2 53.0 54.3 54.5
49.8 50.0 50.3 52.7
48.1 50.8 52.3 54.4
45.0 47.0 47.3 48.3
51.2 51.4 51.6 51.9
48.5 49.2 53.0 55.5
52.1 52.8 53.7 55.0
48.2 48.9 49.3 49.8
49.6 50.4 51.2 51.8
50.7 51.7 52.7 53.3
47.2 47.7 48.4 49.5
53.3 54.6 55.1 55.3
46.2 47.5 48.1 48.4
46.3 47.6 51.3 51.8
;

data ramus2; set ramus;
y=age1; age=8.0; boy=_n_; output;
y=age2; age=8.5; boy=_n_; output;
y=age3; age=9.0; boy=_n_; output;
y=age4; age=9.5; boy=_n_; output;
drop age1 age2 age3 age4;
proc print; run;