the following is original data
class count
1 2
1 1
1 2
1 3
1 2
2 4
2 2
2 4
3 5
3 1
3 5
I would like to create a new variable that record the largest count from the first.class until the current class in a group.
Here is what I want to get.
class count record(the largest)
1 2 2
1 1 2
1 2 2
1 3 3
1 2 3
2 4 4
2 2 4
2 3 4
3 3 3
3 1 3
3 5 5
I tried :
data object_chapter_number4 ;
set object_chapter_number2;
if count> record then record=count;
by class count;
if first.class then record=count ;
run;
But it is not what I want to get.....How could I do?
Look up RETAIN
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