Blurb::
String abscissas for a point histogram

Description::
A list of string abscissa ("x" coordinate) values characterizing the
probability density function for each of the string \c
histogram_point_uncertain variables.  These must be listed in
(lexicographically) increasing order for each variable, and are paired
with \ref variables-histogram_point_uncertain-string-counts.  See
\ref variables-histogram_point_uncertain for details and examples.

Topics::	
Examples::
Theory::
Faq::
See_Also::	
