Hi there,
Please see below is what I try to get:
ID | visit | want | |
01 | 30 | 0 | |
01 | 34 | 4 | = 34-30 |
01 | 39 | 5 | = 39-34 |
01 | 45 | 6 | = 45-39 |
02 | 35 | 0 | = 35-35 |
02 | 40 | 5 | = 40-35 |
02 | 42 | 2 | = 42-40 |
How to code in SAS to get the value in "want"?
any help will be very appriciate.
Thanks in advance!
data have;
input ID visit;
cards;
01 30
01 34
01 39
01 45
02 35
02 40
02 42
;
data want;
set have;
by id visit;
want=visit-lag(visit);
if first.id then want=0;
run;
data have;
input ID visit;
cards;
01 30
01 34
01 39
01 45
02 35
02 40
02 42
;
data want;
set have;
by id visit;
want=visit-lag(visit);
if first.id then want=0;
run;
Minor change suggestion to @Jagadishkatam
data want; set have; by id; want = dif(visit); if first.id then want=0; run;
The Dif function is the equivalent of : var- lag(var);
Thanks so much!!
it's very helpful!
Thank you so much for your prompt solution response.
I appreciated it.
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