[Numpy-discussion] numpy.linalg interference with matplot.lib

Kevin Sheppard kevin.k.sheppard at gmail.com
Mon Jan 11 06:02:02 EST 2021

Are you using NumPy <= 1.19.3 and WIndows 2004 or 20H2?  If so, you should
upgrade to NumPy 1.19.5.


On Mon, Jan 11, 2021 at 10:51 AM Frederix96 <frederix.noel at gmail.com> wrote:

> Dear numpy community,
> I am having an issue with numpy.linalg where a matrix inversion of a
> complex matrix using numpy.linalg.inv results in containing nan values
> when a plot of any kind was performed beforehand by matplotlib. For the
> specific details on the problem and what I have tried already see the
> stackoverflow post I started a month ago:
> https://stackoverflow.com/questions/65183984/why-does-plotting-something-with-matplotlib-change-the-first-outcome-of-a-numpy
> I know that this problem has to do with some specifics of the maschine I
> am using, as it does not happen on other maschines I tried. However it
> still appears after rebuilding my entire python enviroment. Hence I ran
> out of options appart from setting up my whole PC from scratch again,
> which I would rather not do.
> Is some problem like this known in the community?
> Has anyone an idea at which other specifications of my system it might
> be worth taking a look at?
> Thanks a lot in advance!
> Best regards,
> Frederix96
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