Change way maximum and minimum deal with nans.

Add ufuncs fmax and fmin.

In the following, a complex number is considered a nan if the real or imaginary
part is nan. This means that there are many different complex numbers that are
nans and this effects the nan values returned by the maximum, minimum, fmax, and
fmin ufuncs.

The maximum and minimum ufuncs are the same as before unless nans are involved.
In the case of nans, if both values being compared are nans, then the first is
returned, otherwise the nan value is returned. This has the effect of
propagating nans.

The fmax and fmin ufuncs return the same values as maximum and minimum if
neither value being compared is nan.  In the case of nans, if both values being
compared are nans, then the first is returned, otherwise the non-nan value is
returned. This has the effect that nans are ignored unless both values are nan.

0 files changed, 0 insertions, 0 deletions