axes3d.py error when using lines3d and surface3d demos  #3898

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1. WeatherGod commented on Dec 7, 2014

   

   WeatherGod

   on Dec 7, 2014

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   This might be related to a recent change. Thoughts, @mdboom?

   On Sun, Dec 7, 2014 at 5:57 AM, James McCormac [email protected]
   wrote:

   Hi, I recently grabbed the 1.5.x version of matplotlib from github and get
   some errors when using the 3d plotting demos on the matplotlib website. See
   below for an output. I am running python 2.7.8_2 from homebrew. I get the
   same error for both demo scripts.

   Has something changed in 1.5.x such that the demos are calling things
   differently?

   Cheers
   James

   James@Jamess-MBP> python -i lines3d_demo.py
   Traceback (most recent call last):
   File
   "/usr/local/Cellar/python/2.7.8_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib-1.5.x-py2.7-macosx-10.10-x86_64.egg/matplotlib/artist.py",
   line 59, in draw_wrapper
   draw(artist, renderer, _args, *_kwargs)
   File
   "/usr/local/Cellar/python/2.7.8_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib-1.5.x-py2.7-macosx-10.10-x86_64.egg/matplotlib/figure.py",
   line 1090, in draw
   func(*args)
   File
   "/usr/local/Cellar/python/2.7.8_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mpl_toolkits/mplot3d/axes3d.py",
   line 273, in draw
   ax.draw(renderer)
   File
   "/usr/local/Cellar/python/2.7.8_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mpl_toolkits/mplot3d/axis3d.py",
   line 264, in draw
   self.axes.transAxes.transform(peparray[0:2, 0]))
   ValueError: Expected 2-dimensional array, got 1

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2. edonyzpc commented on Jan 29, 2015

   

   edonyzpc

   on Jan 29, 2015

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   I got the a problem which is similar. On Mac OSX10.10.2, brew python 2.7.9 and installing matplotlib with pip. When I plotting 3d, I got the problem.

   #--------------- plot3d function define in file plotData.py-----------------#
    def plot3d(x,y,J):                                                                                                                    
         fig = plt.figure(2)
         ax = Ax3(fig)
         ax.plot_surface(x,y,J,rstride=5,cstride=5,cmap=cm.summer_r)
         plt.show()
   #-------------- call the plot3d() and plot the 3d figure ------------------#                                                               
   print('Visualizing J(theta_0, theta_1) ...\n')
   theta_0 = np.array([np.linspace(-10,10,num=100)])
   theta_1 = np.array([np.linspace(-1,4,num=100)])
   J_theta = np.array(np.empty((100,100)))
   for i in range(100):
       for j in range(100):
           J_theta[i,j] = compC(x,y,[[theta_0[0,i]],[theta_1[0,j]]])
   from plotData import plot3d
   plot3d(theta_0,theta_1.T,J_theta)
   #------------ end of the code ------------#

   My 3d-figure can be plotted. There is a warning that upset me for my cursor put into the plotting area it will occur.

   #------------ the warning error -------------#
   Visualizing J(theta_0, theta_1) ...
   
   /usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mpl_toolkits/mplot3d/axes3d.py:1094: FutureWarning: comparison to `None` will result in an elementwise object comparison in the future.
     if self.button_pressed in self._rotate_btn:
3. WeatherGod commented on Jan 29, 2015

   

   WeatherGod

   on Jan 29, 2015

   Member

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   That warning is something different, but it is something I need to fix soon.

   On Thu, Jan 29, 2015 at 12:31 PM, edony [email protected] wrote:

   I got the a problem which is similar. On Mac OSX10.10.2, brew python 2.7.9
   and installing matplotlib with pip. When I plotting 3d, I got the problem.

   #--------------- plot3d function define in file plotData.py-----------------#
   def plot3d(x,y,J):
   fig = plt.figure(2)
   ax = Ax3(fig)
   ax.plot_surface(x,y,J,rstride=5,cstride=5,cmap=cm.summer_r)
   plt.show()#-------------- call the plot3d() and plot the 3d figure ------------------# print('Visualizing J(theta_0, theta_1) ...\n')
   theta_0 = np.array([np.linspace(-10,10,num=100)])
   theta_1 = np.array([np.linspace(-1,4,num=100)])
   J_theta = np.array(np.empty((100,100)))for i in range(100):
   for j in range(100):
   J_theta[i,j] = compC(x,y,[[theta_0[0,i]],[theta_1[0,j]]])from plotData import plot3d
   plot3d(theta_0,theta_1.T,J_theta)#------------ end of the code ------------#

   My 3d-figure can be plotted. There is a warning that upset me for my
   cursor put into the plotting area it will occur.

   #------------ the warning error -------------#
   Visualizing J(theta_0, theta_1) ...
   /usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mpl_toolkits/mplot3d/axes3d.py:1094: FutureWarning: comparison to None will result in an elementwise object comparison in the future.
   if self.button_pressed in self._rotate_btn:

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4. mdboom commented on Jan 29, 2015

   

   mdboom

   on Jan 29, 2015

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   Hmm... I can't reproduce. Is this still an issue?
5. jenshnielsen commented on Jan 29, 2015

   

   jenshnielsen

   on Jan 29, 2015

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   The example should work in current master see http://matplotlib.org/devdocs/examples/mplot3d/lines3d_demo.html
6. edonyzpc commented on Jan 30, 2015

   

   edonyzpc

   on Jan 30, 2015

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   @jenshnielsen
   Is there any differences between the usage of my code and the example's?

   #--------------- my way to plot 3d-figure-----------------#
   from maplotlib import cm
   from mpl_toolkits.mplot3d.axes3d import Axes3D as Ax3
    def plot3d(x,y,J):                                                                                                                    
         fig = plt.figure(2)
         ax = Ax3(fig)
         ax.plot_surface(x,y,J,rstride=5,cstride=5,cmap=cm.summer_r)
         plt.show()
7. jenshnielsen commented on Jan 30, 2015

   

   jenshnielsen

   on Jan 30, 2015

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   @Edonym I was refering to the original issue. That issue is caused by the ValueError above and is not related to the warning which is harmless at this stage. It just means that we have to fix the code to work with future versions of Numpy

   If you don't want the warning to show you can use a warning filter with a context manager around the plot to suppress the warning. See https://docs.python.org/2/library/warnings.html

   def plot3d(x,y,J):
       with warnings.catch_warnings():
           warnings.filterwarnings("ignore", category=FutureWarning)
           fig = plt.figure(2)
           ax = Ax3(fig)
           ax.plot_surface(x,y,J,rstride=5,cstride=5,cmap=cm.summer_r)
           plt.show()
8. tacaswell

   added

   status: needs confirmation

   on Jan 30, 2015
9. tacaswell

   added this to the unassignedThis milestone has been deleted milestone on Jan 30, 2015
10. chebee7i commented on Jun 13, 2015

    

    chebee7i

    on Jun 13, 2015

    Contributor

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    I'm getting this same error on the dev version of matplotlib (presently fdf1bb5). The test case is to run:

    http://matplotlib.org/1.4.3/examples/mplot3d/scatter3d_demo.html

    As far as I can tell, none of the mplot3d examples work and the entire toolkit is unusable. My numpy version is '1.10.0.dev0+d770034'.
11. tacaswell commented on Jun 13, 2015

    

    tacaswell

    on Jun 13, 2015

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    I was getting very similar errors in #4506

    I ended up running a full bisect from v1.4.3 to master and in the end could not reproduce it with a clean install.

    I suspect I was having these issues due to crossed source installs,

    git clean -xfd
    python setup.py develop
    

    seems to be what fixed it for me.
12. chebee7i commented on Jun 13, 2015

    

    chebee7i

    on Jun 13, 2015

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    Fixed it for me as well. Thanks!
13. efiring commented on Jun 13, 2015

    

    efiring

    on Jun 13, 2015

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    It looks to me like this can be closed; if anyone disagrees, feel free to reopen it, with an explanation of what the current problem is.
14. efiring

    closed this as completedon Jun 13, 2015
15. tacaswell commented on Jun 13, 2015

    

    tacaswell

    on Jun 13, 2015

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    Given the very very strange things (func(..) works, a = func(..) does not) I was seeing in #4506 I am a it worried that there is something is going really sidways pretty far down, but I could believe that it is stale binaries from the cxx refactor.
16. jmccormac01 commented on Sep 13, 2015

    

    jmccormac01

    on Sep 13, 2015

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    Hi Guys,
    Sorry for the extreme tardiness in replying. This morning I finally got back around to looking at this. I was able to fix this problem by removing everything matplotlib related and reinstalling. Everything looks ok now and the 3D plots are working fine.

    Cheers
    James