topic Re: The CLASS variable has more than two levels in SAS Procedures

The CLASS variable has more than two levels

yael — Wed, 20 Apr 2016 09:32:25 GMT

Hello

I am trying to check t test while I have a variables dl dm dn (profit vs assets in 3 variations) while my class is az. The az is dummy variable with 0 or 1 (1 is a family and 0 is not a family).

This is my project:

proc ttest data=sasuser.sasfile120416;

class az;

var dl dm dn;

run;

And the answer I got in log is

ERROR: The CLASS variable has more than two levels.

I checked and the az is only 1 and 0, so what it could be?

Thanks for any help!

Re: The CLASS variable has more than two levels

Reeza — Wed, 20 Apr 2016 09:53:12 GMT

Any missing values? Is a format applied to variable.

Post output from following:

proc freq data=sasuser.sasfile120416;
Format az;
Table az/missing
Run;

Re: The CLASS variable has more than two levels

FreelanceReinh — Wed, 20 Apr 2016 10:06:20 GMT

@Reeza: Observations with missing values of the CLASS variable would be omitted from the calculations. Also, class levels are determined from the formatted values of the CLASS variable.

@yael: Is az a numeric variable or a character variable? Does it have a format (see PROC CONTENTS output)?