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The X12 Procedure


USERDEFINED variables ;

The USERDEFINED statement is used to identify the variables in the input data set that are available for user-defined regression. Only numeric variables can be specified. Note that specifying variables in the USERDEFINED statement does not include the variables as regressors. If a variable is specified in the INPUT statement or REGRESSION USERVAR= option, it is not necessary to include that variable in the USERDEFINED statement. However, if a variable is specified in the MDLINFOIN= data set and is not specified in an INPUT statement or in the REGRESSION USERVAR= option, then the variable should be specified in the USERDEFINED statement in order to make the variable available for regression.

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