@node CTABLES Summary Functions for Individual Cells
@subsubsection Summary Functions for Individual Cells
-This section lists the summary functions that can be applied to
-individual cells in @code{CTABLES}. Only one such summary function,
+This section lists the summary functions that consider only an
+individual cell in @code{CTABLES}. Only one such summary function,
@code{COUNT}, may be applied to both categorical and scale variables:
@table @asis
Only one axis's labels may be moved, whether to the opposite axis or
to the layer axis.
+@subsubheading Effect on Summary Statistics
+
+@code{CLABELS} primarily affects the appearance of tables, not the
+data displayed in them. However, @code{CTABLES} can affect the values
+displayed for statistics that summarize areas of a table, since it can
+change the definitions of these areas.
+
+For example, consider the following syntax and output:
+
+@example
+CTABLES /TABLE AgeGroup BY qns3a [ROWPCT, COLPCT].
+@end example
+@psppoutput {ctables23}
+
+@noindent
+Using @code{COLLABELS=OPPOSITE} changes the definitions of rows and
+columns, so that column percentages display what were previously row
+percentages and the new row percentages become meaningless (because
+there is only one cell per row):
+
+@example
+CTABLES
+ /TABLE AgeGroup BY qns3a [ROWPCT, COLPCT]
+ /CLABELS COLLABELS=OPPOSITE.
+@end example
+@psppoutput {ctables24}
+
@node CTABLES Per-Variable Category Options
@subsection Per-Variable Category Options