Unexpected outcome with matplotlib.pyplot.pcolor()

[strpeter]

Bug report

The entire 3d plot after latex compilation has the same color, i.e. a bug similar to #7243 also applies also to the command matplotlib.pyplot.pcolor().

Code for reproduction

import numpy as np
import matplotlib.pyplot as plt
from matplotlib2tikz import save as tikz_save

pa = np.linspace(.1, 1, num=11)
pb = np.linspace(.1, 1, num=11)
pa, pb = np.meshgrid(pa, pb)
q = 1/(pa+pb)

plt.pcolor(pa, pb, q)
plt.colorbar()
tikz_save('test_tikz.tikz')

Actual outcome

The pdf generated with latex containing the 3d plot is supposed to be of variable color but the entire 3d plot has the same color.

Versions

Operating System: Linux 4.18.9-arch1-1-ARCH
Python = 3.7.0 (installed from pacman)
numpy = 1.15.2
matplotlib = 2.2.3
matplotlib2tikz = 0.6.18

[WeatherGod]

This might be a bug in matplotlib2tikz. In the code you provided, I can only presume that rendering is somehow performed by tikz_save(). If that function is merely iterating through the artist tree and saving out the results without resolving colors and other features, which normally happens during draw-time, then it wouldn't get these things right. This package doesn't seem to follow the proper methods for adding new export formats (admittedly, matplotlib hasn't really made that friendly to external packages, either), but that is really the only way to do it properly.

…

On Tue, Oct 2, 2018 at 1:58 PM strpeter ***@***.***> wrote: Bug report *The entire 3d plot after latex compilation has the same color, i.e. a bug similar to #7243 <#7243> also applies also to the command matplotlib.pyplot.pcolor().* *Code for reproduction* import numpy as npimport matplotlib.pyplot as pltfrom matplotlib2tikz import save as tikz_save pa = np.linspace(.1, 1, num=11) pb = np.linspace(.1, 1, num=11) pa, pb = np.meshgrid(pa, pb) q = 1/(pa+pb) plt.pcolor(pa, pb, q) plt.colorbar() tikz_save('test_tikz.tikz') *Actual outcome* The pdf generated with latex containing the 3d plot is supposed to be of variable color but the entire 3d plot has the same color. Versions Operating System: Linux 4.18.9-arch1-1-ARCH Python = 3.7.0 (installed from pacman) numpy = 1.15.2 matplotlib = 2.2.3 matplotlib2tikz = 0.6.18 — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#12373>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AARy-EV9u3tNZ0v-yLJX4LjOKoshK_zMks5ug6lBgaJpZM4XEj8x> .

[jklymak]

This seems like a bug to report to matplotlibtikz. But feel free to comment here if there is something for us to do.