如何按组对SAS中的观测值进行汇总？

Question

I have an example of a dataset in the following manner

data have;
input match percent;
cards;
0   34
0   54
0   33
0   23
1   60  
1   70
1   70
1   70
;

Essentially I want to sum the observations that are associated with 0 and then divide them by the number of 0 s to find the average. eg 34+54+33+23/4 then do the same for 1 's

I looked at PROC TABULATE. However, I don't understand how to carry out this procedure.

Answer 1

Many ways to do this in SAS. I would use PROC SQL

proc sql noprint;
create table want as
select match, 
       mean(percent) as percent
   from have
   group by match;
quit;

Answer 2

You can use proc means and you will the mean plus a bunch of other stats: more examples here for proc means .

proc means data=have  noprint;
by match;
output out=want ;

Output:

Answer 3

This can be done very easily using proc summary or proc means .

proc summary data=have nway missing;
class match;
var percent;
output out=want mean=;
run;

You can also output a variety of other statistics using these procedures.