Answer Posted / prakash hullathi

use frequency procedure with single column
data dups;
input var1;
datalines;
1
2
3
4
4
3
5
6
;
run;
proc freq data=dups;
tables var1/norow nocol nopercent;
run;


The output will be like this


var1 frequency cumulative frequency
1 1 1
2 1 2
3 2 4
4 2 6
5 1 7
6 1 8


here the observations for the variable var1 3 and 4 are
appered 2 times and remaining appeared for 1 time by
seeing the frequency of corresponding variable and
observation

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