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Fri Sep 23 11:16:01 EDT 2005 · http://mail.python.org/pipermail/python-list/2005-September/320645.html

In choosing a way to represent a value of "no information" for a float, would it be better to use NaN or None?  None has the advantage of standard behavior across platforms, but NaN seems to propagate more easily - at least on Windows.

For example,

NaN+1 = NaN

but

None+1

raises an exception.

Thanks in advance for any advice.

Jon K Peck (Kim)

peck at spss.com <mailto:peck at spss.com> 

312-651-3435

233 S Wacker Dr

Chicago, IL 60606

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NaN Vs None