PLS Syntax - Example 1: Multiple Regression with Categorical Predictors

This example illustrates the specification for a simple multiple regression problem with a single dependent variable. Note that brief descriptive comments are enclosed in curly brackets. You can run this example with the example data file Exp.sta.

PLS;

{ Dependent variable (list): }

   DEPENDENT = STRESS_R;

{ Specification of grouping variables (factors); note that

  optional grouping codes (values) are specified to identify

  (selected) the groups in the categorical predictors. }

   GROUPS = GENDER ("MALE" "FEMALE")

            TIME   (1 2 3);

{ Specification of continuous predictor variables (covariates) }

   COVARIATE = CORRECT1 CORRECT2 CORRECT3;

{ Here the bar operator is used to construct the full factorial

  design for the categorical predictor variables; the bar operator

  will evaluate to all main effects and interactions

  between the grouping variables. }

   DESIGN =  CORRECT1+CORRECT2+CORRECT3+

             GENDER | TIME;

For more examples, see PLS Syntax - Examples.

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