[Matplotlib-users] log xaxis for contourf

[Ian Thomas]

Dimitri,

Although there is no explicit 'log axis' argument that contour accepts, you
can use this:

plt.contourf(f_psd_welch, traverseCoord, 10*np.log10(psd_hotwire_FS_welch))
plt.gca().set_xscale('log')
plt.xlim([np.min(f_psd_welch[1:]), np.max(f_psd_welch[1:])])

Ian

On 24 November 2017 at 20:03, dimitrif <df388 at cam.ac.uk> wrote:

> Hi Ian,
>
> Amazing, thank you very much for your help! Now, it works as expected.
>
> I actually got the following warning 'RuntimeWarning: divide by zero
> encountered in log10' when running the script but I couldn't connect it to
> the outcome. Sometimes a new pair of eyes and a fresh mind helps to solve
> the issue in a few seconds.
>
> Sounds logically for me that changing the library would not be necessary. I
> wonder why contourf does not have the option to switch the axes to log
> similar to loglog or semilogx? That would look much nicer and save a lot of
> time adjusting the axes of contourf.
>
> Dimitri
>
>
>
> --
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