VARREDUCE Procedure
CLASS Statement
CLASS variable <(options)>…<variable <(options)>> </ global-options>;
The CLASS statement names the classification variables to be used as explanatory variables in the analysis. The CLASS statement must precede the REDUCE statement.
The VARREDUCE procedure supports the GLM method of CLASS variable parameterization; for more information, see the section GLM Parameterization of Classification Variables and Effects.
You can specify options either as individual variable options, by enclosing the options in parentheses after the variable name, or as global-options, by placing them after a slash (/). Global-options are applied to all variables that are specified in the CLASS statement. If you specify more than one CLASS statement, the global-options that are specified in any one CLASS statement apply to all CLASS statements. However, individual CLASS variable options override the global-options.
Table 2 summarizes the values you can use for either an option or a global-option. The options are described in detail in the list that follows Table 2.
Table 2: CLASS Statement Options
| Option | Description |
|---|---|
| DESCENDING | Reverses the sort order |
| MISSING | Treats missing values as valid levels |