Re: [Matplotlib-users] Bug when zooming on multiple lines separated by None

[Charleux L. <lud...@gm...>]

Hello Phil,

Your example does not trigger the bug because you don't zoom or specifiy
xlim/ylim so that some points are (far) out of the current axis. For
example, if you just add these lines to your code, you'll have it:

import matplotlib.pyplot as plt
import numpy as np
x = np.array([0, 1, None, 1, 0])
y = np.array([0, 1, None, 0, 1])
plt.plot(x, y)
# Add this or zoom in the upper left corner.
plt.xlim([0., 0.2])
plt.ylim([.9, 1.1])
plt.show()

Here I see an horizontal line where I should see a 45° tilted line. And the
nasty part of this bug is that it only affects lines declared with at least
one None in them where continuous lines seem unaffected as shown here:

import matplotlib.pyplot as plt
import numpy as np
x0 = np.array([0, 1])
y0 = np.array([0, 1])
x1 = np.array([1, 0])
y1 = np.array([0, 1])
plt.plot(x0, y0)
plt.plot(x1, y1)
# Add this
plt.xlim([0., 0.2])
plt.ylim([.9, 1.1])
plt.show()

I get a 45° line.

Ludovic

ps: I use matplotlib 1.1.1rc (stock version available on repositories) on
Xubuntu 12.04 (precise) 64-bit

2012/10/3 Phil Elson <pel...@gm...>

> This works for me with 1.2 (not tested before that):
>
>
> import matplotlib.pyplot as plt
> import numpy as np
>
>
> x = np.array([0, 1, None, 1, 0])
> y = np.array([0, 1, None, 0, 1])
>
> plt.plot(x, y)
>
> plt.show()
>
>
>
> I get two distinct lines crossing each other at (0.5, 0.5)
>
>
> HTH,
>



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