Assume I have the following table:
row | ID | dummy_variable | my_new_dummy |
1 | 1 | 0 | |
2 | 1 | 1 | |
3 | 1 | 0 | 1 |
4 | 2 | 0 | |
5 | 2 | 0 | |
6 | 2 | 0 | |
7 | 2 | 0 | |
8 | 2 | 1 | |
9 | 2 | 0 | 1 |
so, as you can see we have two unique ID (1 and 2), for each of the unique id we have a column "dummy_variable" which has a 1 in it. The first row AFTER dummy_variable = 1 I want to "mark" by creating a new column: "my_new_dummy_variable" which should have the value 1 on the first row after dummy_variable = 1.
Any ideas on how to do this?
Thanks.
/* UNTESTED CODE */
data want;
set have;
prev_dummy_variable=lag(dummy_variable);
if prev_dummy_variable=1 then my_new_dummy=1;
else my_new_dummy=.;
drop prev_dummy_variable;
run;
/* UNTESTED CODE */
data want;
set have;
prev_dummy_variable=lag(dummy_variable);
if prev_dummy_variable=1 then my_new_dummy=1;
else my_new_dummy=.;
drop prev_dummy_variable;
run;
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