How do I code a rank in Long format?

[Tpham]

So I have this sample data format

ID	Block	Value	WANT
1	A	-10	1
1	A	0	2
1	A	0.52	3
1	A	18	4
1	A	20	5
1	A	25	6
1	b	-19	1
1	b	0.25	2
1	b	0.96	3
1	b	21	4
1	b	32	5
1	b	45	6

So I want to code a rank based on the values for each ID/block.  All patients have 12 records (6 for block A and 6 for block B). So I did the first step where I used proc sort by ID Block and Value. Now I want to create that WANT variable where it indicates the rank within each ID/Block. What is the easiest way to do this?

Thanks!

[Reeza · Accepted solution]

data want;

by id block;

if first.block then want=1;

else want+1;

run;