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TYPES Statement

Main discussion:	Output Data Set
Requirement:	CLASS statement
Featured in:	Computing Descriptive Statistics with Class Variables and Identifying the Top Three Extreme Values with the Output Statistics

Required Arguments

request(s)

specifies which of the combinations of class variables PROC MEANS uses to create the types, where is the number of class variables. A request is composed of one class variable name, several class variable names separated by asterisks, or ().

To request class variable combinations quickly, use a grouping syntax by placing parentheses around several variables and joining other variables or variable combinations. For example, the following statements illustrate grouping syntax:

Request	Equivalent to
types A*(B C);	types A*B A*C;
types (A B)*(C D);	types A*C A*D B*C B*D;
types (A B C)*D;	types A*D B*D C*D;

Interaction	The CLASSDATA= option places constraints on the NWAY type. PROC MEANS generates all other types as if derived from the resulting NWAY type.
Tip:	Use ( ) to request the overall total (_TYPE_=0).
Tip:	If you do not need all types in the output data set, use the TYPES statement to specify specific subtypes rather than applying a WHERE clause to the data set. This saves time and space.

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