CLASS Statement

The SURVEYMEANS Procedure

CLASS Statement

CLASS $\, | \,$ CLASSES variables ;

The CLASS statement names variables to be analyzed as categorical variables. For categorical variables, PROC SURVEYMEANS estimates the proportion in each category or level, instead of the overall mean. PROC SURVEYMEANS always analyzes character variables as categorical. If you want categorical analysis for a numeric variable, you must include that variable in the CLASS statement.

The CLASS variables are one or more variables in the DATA= input data set. These variables can be either character or numeric. The formatted values of the CLASS variables determine the categorical variable levels. Thus, you can use formats to group values into levels. Refer to the discussion of the FORMAT procedure in the SAS Procedures Guide and to the discussions of the FORMAT statement and SAS formats in SAS Language Reference: Dictionary.

You can use multiple CLASS statements to specify categorical variables.

When you specify class variables, the procedure uses the SAS system option SUMSIZE= for the amount of memory that is available for data analysis. Refer to the chapter on SAS System options in SAS Language Reference: Dictionary for a description of the SUMSIZE= option.

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