topic Re: Including all observation categories from a class variable in a proc means in SAS Programming

Including all observation categories from a class variable in a proc means

G-Scott — Wed, 05 Apr 2023 23:22:38 GMT

Hi All,

So I am using proc means to generate some stats on two variable, let’s say TimeFromEventA and TimeFromEventB for a group of individuals by race/ethnicity.

So, the issue I am running into is I would like lines for all of the class options, even if there are no observations.

For example:

Proc Means data=have;
Var TimeFromEventA TimeFromEventB;
Class raceeth;
Run;

If I don’t have any observations in my data set where raceeth=3…it is not included in the output, and I would like it to be. Any way to make this possible?

Re: Including all observation categories from a class variable in a proc means

ballardw — Thu, 06 Apr 2023 01:09:41 GMT

So you have to have a method to add values that are not present in the data set.

One of the ways is to use a FORMAT to provide the values and a PRELOADFMT option and COMPLETETYPES in Proc Means/Summary:

An example:

Proc format;
value $newgender
'F'='Female'
'M'='Male'
'X'='Other'
;

proc means data=sashelp.class completetypes;
   class sex/preloadfmt;
   format sex $newgender.;
   var height weight;
run;

The format provides a formatted value for a variable expecting values of F, M and X. The SASHELP.CLASS data set has values of F and M for the Sex variable. The Preloadfmt works with Completetypes to accomplish the values that don't appear in the actual data.

Re: Including all observation categories from a class variable in a proc means

Ksharp — Thu, 06 Apr 2023 11:49:21 GMT

/*
Or try CLASSDATA= option.
*/
data have;
 set sashelp.class;
run;

proc sql;
create table levels as
select distinct sex from have
union
select 'X' from have(obs=1)
union
select 'Y' from have(obs=1)
union
select 'Z' from have(obs=1)
;
quit;

proc means data=have classdata=levels ;
   class sex ;
   var height weight;
run;

Re: Including all observation categories from a class variable in a proc means

PaigeMiller — Thu, 06 Apr 2023 11:59:10 GMT

@Ksharp wrote:

/*
Or try CLASSDATA= option.
*/

proc means data=have classdata=levels ;
   class sex ;
   var height weight;
run;

After all these years of using PROC MEANS/PROC SUMMARY on a daily basis at work, and trying to explain PROC MEANS/PROC SUMMARY to total strangers while I am on vacation, I still learn something new from this forum. Thanks, @Ksharp

Re: Including all observation categories from a class variable in a proc means

G-Scott — Thu, 06 Apr 2023 15:17:21 GMT

I would also note that this also worked. Thank you!