SPSS® 12.0 Command Syntax Reference

CATPCA 201
The keyword TO in a variable list can only be used with variables that are in the ANALYSIS
subcommand, and TO applies only to the order of the variables in the ANALYSIS
subcommand. For variables that are in the VARIABLES subcommand but not in the ANALYSIS
subcommand, the keyword TO cannot be used. For example, if /VARIABLES = v1 TO
v5 and /ANALYSIS = v2 v1 v4, then /PLOT OBJECT(v1 TO v4) will give two
object plots, one labeled with v1 and one labeled with v4.
PLOT Subcommand
The PLOT subcommand controls the display of plots. The default keywords are OBJECT and
LOADING. That is, the two keywords are in effect when the PLOT subcommand is omitted or
when the PLOT subcommand is given without any keyword. If a keyword is duplicated (for
example, /PLOT = RESID RESID), then only the last one is effective. If the keyword NONE is
used together with other keywords (for example, /PLOT = RESID NONE LOADING), then only
the keywords following NONE are effective. That is, when keywords contradict, the later one
overwrites the earlier ones.
• All the variables to be plotted must be specified on the ANALYSIS subcommand.
• If the variable list following the keywords CATEGORIES, TRANS, RESID, and PROJCENTR
is empty, it will cause a syntax error, and the procedure will terminate.
• The variables in the variable list for labeling the object point following OBJECT, BIPLOT,
and TRIPLOT must be specified on the VARIABLES subcommand but need not appear on
the ANALYSIS subcommand. This means that variables not included in the analysis can
still be used to label plots.
• The keyword TO in a variable list can only be used with variables that are in the ANALYSIS
subcommand, and TO applies only to the order of the variables in the ANALYSIS subcommand.
For variables that are in the VARIABLES subcommand but not in the ANALYSIS subcommand,
the keyword TO cannot be used. For example, if /VARIABLES = v1 TO v5
and /ANALYSIS = v2 v1 v4, then /PLOT OBJECT(v1 TO v4) will give two
object plots, one labeled with v1 and one labeled with v4.
• For a one-dimensional solution, only unidimensional plots (transformation plot, residuals
plot, and plot of projected centroids) are produced.
• For multidimensional plots, all of the dimensions specified on the DIMENSION subcommand
are produced in a matrix scatterplot if the specified number of dimensions is greater
than two; if the specified number of dimensions is two, a scatterplot is produced.
The following keywords can be specified:
OBJECT (varlist)(n) Plots of the object points. Following the keyword, a list of variables in
parentheses can be given to indicate that plots of object points labeled
with the categories of the variables should be produced (one plot for
each variable). If the variable list is omitted, a plot labeled with case
numbers is produced.