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.