PROC RELIABILITY: CLASS Statement

CLASS Statement

CLASS variable-names</ options> ;

The CLASS statement specifies variables in the input data set that serve as indicator, dummy, or classification variables in the MODEL statement. If a CLASS variable is specified as an independent variable in the MODEL statement, the RELIABILITY procedure automatically generates an indicator variable for each level of the CLASS variable. The indicator variables generated are used as independent variables in the regression model specified in the MODEL statement. An indicator variable for a level of a CLASS variable is a variable equal to 1 for those observations corresponding to the level and equal to 0 for all other observations.

You can specify the following option in the CLASS statement.

TRUNCATE<=n>: specifies the length n of CLASS variable values to use in determining CLASS variable levels. If you specify TRUNCATE without the length n, the first 16 characters of the formatted values are used. When formatted values are longer than 16 characters, you can use this option to revert to the levels as determined in releases before SAS 9. The default is to use the full formatted length of the CLASS variable.