[Matplotlib-users] Does matplotlib 3D support non-linear scaling?

[John L. <joh...@sb...>]

The following minimal code example illustrates a problem I'm having.

    import matplotlib.pyplot as plt
    from mpl_toolkits.mplot3d import Axes3D

    # succeeds
    fig = plt.figure()
    ax = fig.add_subplot(111, projection='3d')
    plt.show()

    # succeeds
    fig = plt.figure()
    ax = fig.add_subplot(111)
    ax.set_xscale("log")
    plt.show()

    # fails
    fig = plt.figure()
    ax = fig.add_subplot(111, projection='3d')
    ax.set_xscale("log")
    plt.show()


Here is the traceback:

    Exception in Tkinter callback
    Traceback (most recent call last):
       File "/usr/lib/python3.4/tkinter/__init__.py", line 1490, in __call__
         return self.func(*args)
       File
    "/usr/lib/python3/dist-packages/matplotlib/backends/backend_tkagg.py",
    line 276, in resize
         self.show()
       File
    "/usr/lib/python3/dist-packages/matplotlib/backends/backend_tkagg.py",
    line 348, in draw
         FigureCanvasAgg.draw(self)
       File
    "/usr/lib/python3/dist-packages/matplotlib/backends/backend_agg.py",
    line 451, in draw
         self.figure.draw(self.renderer)
       File "/usr/lib/python3/dist-packages/matplotlib/artist.py", line
    56, in draw_wrapper
         draw(artist, renderer, *args, **kwargs)
       File "/usr/lib/python3/dist-packages/matplotlib/figure.py", line
    1035, in draw
         func(*args)
       File
    "/usr/lib/python3/dist-packages/mpl_toolkits/mplot3d/axes3d.py",
    line 267, in draw
         ax.draw(renderer)
       File
    "/usr/lib/python3/dist-packages/mpl_toolkits/mplot3d/axis3d.py",
    line 404, in draw
         tick.draw(renderer)
       File "/usr/lib/python3/dist-packages/matplotlib/artist.py", line
    56, in draw_wrapper
         draw(artist, renderer, *args, **kwargs)
       File "/usr/lib/python3/dist-packages/matplotlib/axis.py", line
    242, in draw
         self.label1.draw(renderer)
       File "/usr/lib/python3/dist-packages/matplotlib/artist.py", line
    56, in draw_wrapper
         draw(artist, renderer, *args, **kwargs)
       File "/usr/lib/python3/dist-packages/matplotlib/text.py", line
    599, in draw
         ismath=ismath, mtext=self)
       File
    "/usr/lib/python3/dist-packages/matplotlib/backends/backend_agg.py",
    line 169, in draw_text
         return self.draw_mathtext(gc, x, y, s, prop, angle)
       File
    "/usr/lib/python3/dist-packages/matplotlib/backends/backend_agg.py",
    line 158, in draw_mathtext
         x = np.round(x + ox + xd)
       File "/usr/lib/python3/dist-packages/numpy/core/fromnumeric.py",
    line 2629, in round_
         return round(decimals, out)
       File "/usr/lib/python3/dist-packages/numpy/ma/core.py", line
    4855, in round
         result._mask = self._mask
    AttributeError: 'numpy.float64' object has no attribute '_mask'

I am hoping to use logarithmic axes in a 3D plot.  I haven't found 
anything in the documentation which says that I am restricted to linear 
scaling.  My system configuration is: Python 3.4, Matplotlib 1.3.1, 
Ubuntu Linux 14.04 64-bit.  My system is selecting the TKAgg backend.

Any advice is appreciated, thanks!