topic Re: how to get the consecutive elevations flagged in SAS Programming

Re: how to get the consecutive elevations flagged

Astounding — Fri, 04 Jan 2013 15:08:32 GMT

Any easy solution will need to make two passes through the data. If two passes through the data is not practical, we can always revisit. So assuming that your data is already in sorted order, and assuming that you followed the suggested solution to create FLAG, process again:

data want;

set want;

by subject test flag notsorted;

if flag=1 and (first.flag=0 or last,.flag=0) then elevated_consecutive_flag='*';

run;

Optionally, you could drop FLAG at that point as well.

Re: how to get the consecutive elevations flagged

rams — Sat, 05 Jan 2013 05:29:34 GMT

Hii

i have a dataset like this

subject	test	visit	high_range	actual_value
101	A	1	30	100
101	A	2	30	90
101	A	3	30	80
101	A	4	30	60
101	A	5	30	55
101	A	6	30	65
101	A	7	30	70
101	A	8	30	95
101	B	1	40	130
101	B	2	40	150
101	B	3	40	65
101	B	4	40	85
101	B	5	40	120
101	B	6	40	135

and i want to flag the >= 3 time elevated values into one variable

then i want to flag the consecutive flags into another variable like this and that to by subject and test

output like this

subject	test	visit	high_range	actual_value	flag_>=3t_elev	consec_flags
101	A	1	30	100	y	y
101	A	2	30	90	y	y
101	A	3	30	80	n	n
101	A	4	30	60	n	n
101	A	5	30	55	n	n
101	A	6	30	65	n	n
101	A	7	30	70	n	n
101	A	8	30	95	y	n
101	B	1	40	130	y	y
101	B	2	40	150	y	y
101	B	3	40	65	n	n
101	B	4	40	85	n	n
101	B	5	40	120	y	y
101	B	6	40	135	y	y

can you please help me out.

Thanks

Re: how to get the consecutive elevations flagged

Astounding — Sat, 05 Jan 2013 16:46:05 GMT

OK, putting together all the previous suggestions, and taking the simplest route:

proc sort data=have;

by subject test visit;

run;

data want;

set have;

if actual_value >= 3*high_range then flag_3xElev='y';

else flag_3xElev='n';

run;

data want;

set want;

by subject test flag_3xElev notsorted;

if flag3xElev='y' and (first.flag_3xElev=0 or last.flag_3xElev=0) then consec_flags='y';

else consec_flags='n';

run;

Good luck.

Re: how to get the consecutive elevations flagged

art297 — Sat, 05 Jan 2013 16:51:06 GMT

: Just out of curiosity, why was this branched to a separate discussion AND how was that accomplished?

Re: how to get the consecutive elevations flagged

Astounding — Sat, 05 Jan 2013 17:12:00 GMT

Art,

I don't know ... I didn't do anything to make it happen. Funny thing is, it now appears in my Content section even though I didn't really initiate it.

All questions and no answers on that one.