don't NaN & infinities hide FP errors

[David M. Cooke]

Gandalf <gandalf at geochemsource.com> writes:

>> Just try it. 1./0. raises a ZeroDivisionError, math.log(0) raises a
>> math range error, and math.log(-1) yields nan.
>
> This is not true. On UNIX systems, math.log(-1) will be NaN.

Not true; all the linux boxes and a Tru64 system I've just tried raise
ValueError. However, the three versions of Python I have on my Mac OS X
system give nan.

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca