topic Re: For Each Update Loop? in SAS Programming

For Each Update Loop?

DavidPhillips2 — Mon, 21 Aug 2017 19:02:06 GMT

In SAS is there an equivalent of

For each employee id do;

LastVariable;

Variable[1-10];

For I =1 to I = 10 do;

If variable(i) is null then then Variable(i) = LastVariable;

End;

I’m trying to update a set of records using the last real value where the value to fill null values further in the series.

Re: For Each Update Loop?

ballardw — Mon, 21 Aug 2017 19:05:58 GMT

Providing a little example data and the desired result will help. "Last variable" without some context may take a lot of verbiage where example data is more concrete. You would not need to provide all 10 variables, 3 or 4 should suffice to show the logic needed.

Re: For Each Update Loop?

DavidPhillips2 — Mon, 21 Aug 2017 19:07:36 GMT

Ballardw, the 10 variables are an arrary.

Re: For Each Update Loop?

Reeza — Mon, 21 Aug 2017 19:21:04 GMT

Your question:

In SAS is there an equivalent of

For each employee id do;

            LastVariable;

            Variable[1-10];

            For I =1 to I = 10 do;

                        If variable(i) is null then then Variable(i) = LastVariable;

            End;

End;

My answer: Yes, SAS has an equivalent. Very close to your 'code' as well.

If you need help on how to code this post more detailed information, including sample data and expected output.

Otherwise see this page on arrays and how to use them:

https://stats.idre.ucla.edu/sas/seminars/sas-arrays/

I don't think any of them exactly match your situation but they should give you an idea.

Re: For Each Update Loop?

DavidPhillips2 — Mon, 21 Aug 2017 21:00:08 GMT

data class2; set sashelp.class;
if weight > 100 then age = .;

run;

proc sort data=class2;
by sex descending age ;
run;

data class2; set class2;
if age = 12 then age = .;
run;

For both genders, I am trying to fill the age with the age before it if it is blank.

Re: For Each Update Loop?

Reeza — Mon, 21 Aug 2017 21:18:28 GMT

data class_want;
set class2;
by sex;
retain age_filled;
if first.sex then age_filled=.;


if age ne . then age_filled=age;

run;

Re: For Each Update Loop?

DavidPhillips2 — Wed, 23 Aug 2017 13:04:55 GMT

Minor enhancement:

data class2; set sashelp.class;
if weight > 100 then age = .;

run;
proc sort data=class2;
by sex descending age ;
run;
data class2; set class2;
if age = 12 then age = .;
run;

data class_want (drop=age rename=(age_filled =age) );
set class2;
by sex;
retain age_filled;
if first.sex then age_filled=.;

if age ne . then age_filled=age;

run;