On Fri, Jul 15, 2011 at 8:46 PM, Steven D'Aprano <steve+comp.lang.pyt...@pearwood.info> wrote: > In general, you have missing values in statistics because somebody wouldn't > answer a question, and the Ethics Committee frowns on researchers torturing > their subjects to get information. They make you fill out forms. >
Which, then, is in support of an explicit "User chose not to answer this question" MISSING value. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
