Hello All,
I am stuck with this issue where I want to add when there is change in flag value. Example:
ID Flag
1 0
1 1
1 1
1 1
2 1
2 0
2 0
2 1
2 1
2 0
2 0
3 1
3 1
3 1
3 1
4 0
4 0
4 0
4 1
4 1
Output expected:
ID Flag Cnt
1 0 1
1 1 2
1 1 2
1 1 2
2 1 1
2 0 2
2 0 2
2 1 3
2 1 3
2 0 4
2 0 4
3 1 1
3 1 1
3 1 1
3 1 1
4 0 1
4 0 1
4 0 1
4 1 2
4 1 2
Use the BY mechanism:
data have;
input ID Flag;
datalines;
1 0
1 1
1 1
1 1
2 1
2 0
2 0
2 1
2 1
2 0
2 0
3 1
3 1
3 1
3 1
4 0
4 0
4 0
4 1
4 1
;
data want;
set have;
by id flag notsorted;
if first.id then cnt = 0;
if first.flag then cnt + 1;
run;
Use the BY mechanism:
data have;
input ID Flag;
datalines;
1 0
1 1
1 1
1 1
2 1
2 0
2 0
2 1
2 1
2 0
2 0
3 1
3 1
3 1
3 1
4 0
4 0
4 0
4 1
4 1
;
data want;
set have;
by id flag notsorted;
if first.id then cnt = 0;
if first.flag then cnt + 1;
run;
Available on demand!
Missed SAS Innovate Las Vegas? Watch all the action for free! View the keynotes, general sessions and 22 breakouts on demand.
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.