Use this field to specify the character or numeric variables for which to construct principal components . Each distinct level of these class variables is used to construct a numerical column of 0s and 1s in the analysis.Caution : Specifying a very large number of variables or using a data set with a large number of variables can prohibitively increase the time needed to run this process.All of the variables in the input data set are displayed in the Available Variables field.
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Highlight one or more variables. To highlight multiple variables at once, hold down while left-clicking on them.
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Clickto add the highlighted variable(s) to the Class Variables field, as shown below: