[Numpy-discussion] log of negative real numbers -> RuntimeWarning: invalid value encountered in log

[Robert Kern]

On Mon, May 25, 2020 at 10:36 AM Sebastian Berg <sebastian at sipsolutions.net>
wrote:

> On Mon, 2020-05-25 at 10:09 -0400, Brian Racey wrote:
> > Would a "complex default" mode ever make it into numpy, to behave
> > more like
> > Matlab and other packages with respect to complex number handling?
> > Sure it
> > would make it marginally slower if enabled, but it might open the
> > door to
> > better compatibility when porting code to Python.
> >
>
> I think the SciPy versions may have such a default, or there is such a
> functionality hidden somewhere (maybe even the switching behaviour).
> I am not sure anyone actually uses those, so it may not be a good idea
> to use them to be honest.
>

The versions in `np.lib.scimath` behave like this. Of course, people do use
them when they want to deal with real numbers as subsets of the complex
numbers.

-- 
Robert Kern
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