Why not use one of the summary tasks?
Otherwise, PROC MEANS and SUMMARY are also options to summarize your data:
*Create summary statistics for a dataset by a 'grouping' variable and store it in a dataset;
*Generate sample fake data;
data have;
input ID feature1 feature2 feature3;
cards;
1 7.72 5.43 4.35
1 5.54 2.25 8.22
1 4.43 6.75 2.22
1 3.22 3.21 7.31
2 6.72 2.86 6.11
2 5.89 4.25 5.25
2 3.43 7.30 8.21
2 1.22 3.55 6.55
;
run;
*Create summary data;
proc means data=have noprint;
by id;
var feature1-feature3;
output out=want median= var= mean= /autoname;
run;
*Show for display;
proc print data=want;
run;
If you need more specific help, please post data as a data step, I'm not typing data from a picture.
Nothing in your code shows you calculating a SUM either...