topic Generate a sequence of observations in SAS Procedures

Generate a sequence of observations

OzoneX15 — Mon, 30 May 2011 05:38:57 GMT

Hi all,

I have a dataset with 5 observations;

OBSERVATION

F
T
J
D
D

I want to spread the observations like this (so the first obervation has to be there for the first five days, the second observations has to be there for the next five days, (from day 6 to 10,... and so on);

I want to come up with the following dataset;

DAY,OBSERVATION
1,F
2,F
3,F
4,F
5,F
6,T
7,T
8,T
9,T
10,T
11,J
12,J
13,J
14,J
15,J
16,D
17,D
18,D
19,D
20,D
21,D
22,D
23,D
24,D
25,D

I have programmed this in the following way,

options nomprint nosymbolgen nomlogic;
%macro result;

data %do i=1 %to 5;

Data VECTOR_PRE (drop=obsnum);
obsnum=&i;
set VECTOR_ point=obsnum;
output;
stop;
run;

DATA OUTPUT&i;
SET VECTOR_PRE;
day=0;
do day=&i*(30)-30+1 to &i*(30);
output;
end;
run;

%end;

data sasuser.want;
set output: indsname=dsn;
drop dsn;
run;
%mend ;
%result

Is there a way to do this in a datastep, so without using a macro?

Kind regards,

Stefaan Message was edited by: OzoneX15

Re: Generate a sequence of observations

Cynthia_sas — Mon, 30 May 2011 06:06:21 GMT

Hi:
It may be that a macro solution is too much programming for what you need.

cynthia
[pre]
data genobs;
infile datalines;
drop i;
retain day 0;
input @1 obsval $;
do i = 1 to 5 by 1;
day + 1;
output;
end;
datalines;
F
T
J
D
D
;
run;

proc print data=genobs noobs;
run;
[/pre]

Re: Generate a sequence of observations

Ksharp — Mon, 30 May 2011 11:04:38 GMT

Hi.Sorry so late to reponse.
How about this:
[pre]

data temp;
input obs $;
datalines;
F
T
J
D
D
;
run;
data want(drop=i);
set temp;
do i=1 to 5;
day+1; output;
end;
run;

[/pre]

My code I send you this morning is worked?

Thanks
Ksharp

Re: Generate a sequence of observations

OzoneX15 — Mon, 30 May 2011 17:55:00 GMT

Thanks Cynthia and Ksharp.

@ Ksharp: Yes the code works perfectly. I've learned to work with arrays now...
but still need to practice:-)

Stefaan