topic Re: retain in SAS Programming

retain

Steelers_In_DC — Sat, 12 Jul 2014 00:40:38 GMT

I am attaching some example code. I want to find if there was an upsell or downsell over two time periods. I tried to use a retain statement with by id plan, thinking that it wouldn't retain across id's, that is not the case. Is retain the right solution for this problem and I have written incorrectly or am I going about this the wrong way.

Re: retain

art297 — Sat, 12 Jul 2014 01:11:11 GMT

data together (drop=diff);

set jun2014 jul2014;

by id;

diff=plan-lag(plan);

if not first.id then do;

if diff eq 0 then change = 'none';

else if diff gt 0 then change = 'up';

else change = 'down';

end;

run;

Re: retain

Steelers_In_DC — Sat, 12 Jul 2014 01:45:27 GMT

Excellent, thank you. I looked up a pdf showing retain vs lag but couldn't get what I wanted out of it

thanks,

Mark