Thank you for the responses, which were very useful. Forgive me for moving to
a variant question.
What would be the simplest way to create a graph in which the x-axis is the
name of many variables (from 10 to 100; but that is a visual question), and
the y asix is the percent of the observations that are missing. One aspect of
the question (as in the prior form of the question) is how to limit the degree
of changing the data (recoding), although it may necessary. The other aspect
is how to graph the percent missing.
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/