SAVE Subcommand (CATREG command)

The SAVE subcommand is used to add the transformed variables (category indicators replaced with optimal quantifications), the predicted values, and the residuals to the working data file.

Excluded cases are represented by a dot (the sysmis symbol) on every saved variable.

TRDATA. Transformed variables.

PRED. Predicted values.

RES. Residuals.

  • A variable rootname can be specified with each of the keywords. Only one rootname can be specified with each keyword, and it can contain up to five characters (if more than one rootname is specified with a keyword, the first rootname is used; if a rootname contains more than five characters, the first five characters are used at most). If a rootname is not specified, the default rootnames (TRA, PRE, and RES) are used.
  • CATREG adds two numbers separated by an underscore (_) to the rootname. The formula is ROOTNAMEk_n, where k increments from 1 to identify the source variable names by using the source variables' position numbers in the ANALYSIS subcommand (that is, the dependent variable has the position number 1, and the independent variables have the position numbers 2, 3, ..., etc., as they are listed), and n increments from 1 to identify the CATREG procedures with the successfully executed SAVE subcommands for a given data file in a continuous session. For example, with two predictor variables specified on ANALYSIS, the first set of default names for the transformed data, if they do not exist in the data file, would be TRA1_1 for the dependent variable, and TRA2_1, TRA3_1 for the predictor variables. The next set of default names, if they do not exist in the data file, would be TRA1_2, TRA2_2, TRA3_2. However, if, for example, TRA1_2 already exists in the data file, then the default names should be attempted as TRA1_3, TRA2_3, TRA3_3—that is, the last number increments to the next available integer.
  • Variable labels are created automatically. (They are shown in the Procedure Information Table (the Notes table) and can also be displayed in the Data Editor window.)