SPSS® 12.0 Command Syntax Reference

CATPCA 193
• The NORMALIZATION subcommand specifies optimization of the association between
variables, and the normalization is given to the objects. This is the default, so this subcommand
could be omitted here.
• MAXITER specifies the maximum number of iterations to be 150 instead of the default
value of 100.
• CRITITER sets the convergence criterion to a value smaller than the default value.
• PRINT specifies descriptives, component loadings and correlations (all default),
quantifications for TEST1 to TEST3, and the object (component) scores.
• PLOT is used to request transformation plots for the variables TEST2 to TEST5, an object
points plot labeled with the categories of TEST2, and an object points plot labeled with
the categories of TEST3.
• The SAVE subcommand adds the transformed variables and the component scores to the
working data file.
• The OUTFILE subcommand writes the transformed data to a data file called trans.sav and
the component scores to a data file called obs.sav, both in the directory c:\data.
VARIABLES Subcommand
VARIABLES specifies the variables that may be analyzed in the current CATPCA procedure.
• The VARIABLES subcommand is required and precedes all other subcommands. The
actual keyword VARIABLES can be omitted.
• At least two variables must be specified, except if the CONFIGURATION subcommand is
used with the FIXED keyword.
• The keyword TO on the VARIABLES subcommand refers to the order of variables in the
working data file. This behavior of TO is different from that in the variable list in the
ANALYSIS subcommand.
ANALYSIS Subcommand
ANALYSIS specifies the variables to be used in the computations, the optimal scaling level,
and the variable weight for each variable or variable list. ANALYSIS also specifies supplementary
variables and their optimal scaling level. No weight can be specified for supplementary
variables.
• At least two variables must be specified, except if the CONFIGURATION subcommand is
used with the FIXED keyword.
• All the variables on ANALYSIS must be specified on the VARIABLES subcommand.
• The ANALYSIS subcommand is required and follows the VARIABLES subcommand.
• The keyword TO in the variable list honors the order of variables in the VARIABLES
subcommand.
• Optimal scaling levels and variable weights are indicated by the keywords LEVEL and
WEIGHT in parentheses following the variable or variable list.