plsxax, except that arguments are flags for z axis.
See the description of
plsxax for more detail.
Variable to set the maximum number of digits for the z axis. If nonzero, the
printed label will be switched to a floating point
representation when the number of digits exceeds
Field digits value. Currently, changing its value here has no
effect since it is set only by
the user may obtain its value after a call to either of these functions by
This function is used in example 31.