The XC variable is the
character equivalent of the X variable. Use XC when the axis values
are character. You must also specify a value of 2 (absolute data values)
for the XSYS variable. (See also
XSYS Variable.) If you use a value other than 2 for the XSYS variable,
the graphics output is not displayed properly.
Note: The X or XC variable is required
unless either the MIDPOINT, GROUP, or SUBGROUP variable provides the
horizontal coordinate.
CAUTION:
Do not
use the X and XC variables in the same data set.
Using both X and XC
variables in the same data set can cause unpredictable results.