Issues zooming in and out with shared axis

[cimarronm]

I'm noticing a problem when zooming in on plots with shared axis and number of points >1000. If I zoom in on a plot and then try going back ('r' or 'h' key), the plots seem to have much of the data masked out.

Minimum working example

import matplotlib.pyplot as plt
import numpy as np

fig, ax = plt.subplots(nrows=2, ncols=1, sharex=True)

size = 10000
ax[0].plot(np.random.random(size))
ax[1].plot(np.arange(size))

plt.show()

[QuLogic]

I don't think the shared axis is even necessary; simply this will trigger it:

import matplotlib.pyplot as plt
import numpy as np
plt.plot(np.random.random(10000))
plt.show()

[mdboom]

Wow. That's pretty serious. I'm going to look into it.

[mdboom]

First bad commit is: 3c2c037

[mdboom]

Would you mind trying #5275 for a fix?

[cimarronm]

@mdboom, #5275 does fix it for me. 👍 Thanks for looking into it; I didn't have time yesterday but wanted to make sure I put the issue up.

[mdboom]

No problem -- it's always better to know about the problem, and thankfully the fix for this should make it into 1.5.0!

[QuLogic]

#5275 was merged.