SPSS® 12.0 Command Syntax Reference

210 Syntax Reference
• VARIABLES defines variables. The keyword TO refers to the order of the variables in the
working data file.
• The ANALYSIS subcommand defines variables used in the analysis. It is specified that
TEST4 is the dependent variable, with optimal scaling level numerical and that the
variables TEST1, TEST2, TEST3, TEST5, TEST7, TEST8, STATUS01, and STATUS02 are
the independent variables to be used in the analysis. (The keyword TO refers to the order
of the variables in the VARIABLES subcommand.) The optimal scaling level for TEST1,
TEST2, and TEST3 is spline ordinal, for TEST5 and TEST7 spline nominal, for TEST8
ordinal, and for STATUS01 and STATUS02 nominal. The splines for TEST1 and TEST2
have degree 1 and three interior knots, the splines for TEST5 and TEST7 have degree 2
and two interior knots (default because unspecified).
• DISCRETIZATION specifies that TEST5 and TEST7, which are fractional-value variables,
are discretized: TEST5 by recoding into seven categories with a normal distribution
(default because unspecified) and TEST7 by “multiplying.” TEST1, which is a categorical
variable, is recoded into five categories with a close-to-uniform distribution.
• Because there are nominal variables, a random initial solution is requested by the INITIAL
subcommand.
• MAXITER specifies the maximum number of iterations to be 100. This is the default, so
this subcommand could be omitted here.
• CRITITER sets the convergence criterion to a value smaller than the default value.
• To include cases with missing values, the MISSING subcommand specifies that for each
variable, missing values are replaced with the most frequent category (the mode).
• PRINT specifies the correlations, the coefficients, the descriptive statistics for all variables,
the ANOVA table, the category quantifications for variables TEST1, TEST2,
TEST3, STATUS01, and STATUS02, and the transformed data list of all cases.
• PLOT is used to request quantification plots for the variables TEST2, TEST5, TEST7, and
TEST4.
• The SAVE subcommand adds the transformed variables to the working data file. The
names of these new variables are TRANS1_1, ..., TRANS9_1.
• The OUTFILE subcommand writes the transformed data to a data file called qdata.sav in
the directory c:\data.
VARIABLES Subcommand
VARIABLES specifies the variables that may be analyzed in the current CATREG procedure.
• The VARIABLES subcommand is required and precedes all other subcommands. The
actual keyword VARIABLES can be omitted. (Note that the equals sign is always optional
in SPSS syntax.)
• The keyword TO on the VARIABLES subcommand refers to the order of variables in the
working data file. (Note that this behavior of TO is different from that in the indvarlist on
the ANALYSIS subcommand.)