topic can anyone help this is urgent in SAS Programming

can anyone help this is urgent

mkpk — Wed, 08 May 2013 03:08:59 GMT

can anyone help me find a way to calculate the proportion of subjects in trt1 per visit receiving placebo from a dataset containing variables ..usubjid, trt1,trt2 .avisit .avisitn .pbo and drug.

i am supposed to plot this proportion as another graph. so i need i need to add this proportion data to the main dataset in order to validate.

please suggest this is urgent . i tried with merge it is not working for some reason. can anyone guide me with proc sql.

Re: can anyone help this is urgent

sandyming — Wed, 08 May 2013 03:48:11 GMT

Something like this?

proc sql;

create table temp as

select a.usubjid, a.avisitn, count1/count2 as pct

(select usubjid, avisitn, count(usubjid) as count2 from dataset where trt1 ne '' group by avisitn ) a

left join

(select usubjid,avisitn,count(usubjid) as count1 from dataset where trt1 ne '' and drug='PLACEBO' group by avisitn) b

where a.avisitn=b.avisitn;

quit;

then you can merge with original with usubjid avisitn....