Re: [Matplotlib-users] plot_wireframe
On Wed, Feb 2, 2011 at 1:16 PM, Patton Bradford wrote: > Just trying to get familiar with mplot3d's functions, and I've run into a > problem with plot_wireframe that I'm having problems running down (or > duplicating, for that matter). I'm trying to generate plots of some wavelet > functions, so I need to plot values against time and scale. I've generated > three numpy arrays: X (time), Y (scale) (generated these using meshgrid), > and Z (values, a rather sparse matrix). I verified that all of these are > the same shape (7x100) by fetching the 'shape' attribute from X,Y,Z. > However, when I call plot_wireframe(), I get this error: > > Exception in Tkinter callback > Traceback (most recent call last): > File "C:\Python26\lib\lib-tk\Tkinter.py", line 1410, in __call__ > return self.func(*args) > File > "C:\Python26\lib\site-packages\matplotlib\backends\backend_tkagg.py", line > 212, in resize > self.show() > File > "C:\Python26\lib\site-packages\matplotlib\backends\backend_tkagg.py", line > 215, in draw > FigureCanvasAgg.draw(self) > File "C:\Python26\lib\site-packages\matplotlib\backends\backend_agg.py", > line 314, in draw > self.figure.draw(self.renderer) > File "C:\Python26\Lib\site-packages\matplotlib\artist.py", line 46, in > draw_wrapper > draw(artist, renderer, *args, **kwargs) > File "C:\Python26\lib\site-packages\matplotlib\figure.py", line 773, in > draw > for a in self.axes: a.draw(renderer) > File "C:\Python26\lib\site-packages\mpl_toolkits\mplot3d\axes3d.py", line > 135, in draw > for col in self.collections] > File "C:\Python26\Lib\site-packages\mpl_toolkits\mplot3d\art3d.py", line > 163, in do_3d_projection > self._segments3d] > File "C:\Python26\lib\site-packages\mpl_toolkits\mplot3d\proj3d.py", line > 211, in proj_trans_points > return proj_transform(xs, ys, zs, M) > File "C:\Python26\lib\site-packages\mpl_toolkits\mplot3d\proj3d.py", line > 193, in proj_transform > vec = vec_pad_ones(xs, ys, zs) > File "C:\Python26\lib\site-packages\mpl_toolkits\mplot3d\proj3d.py", line > 184, in vec_pad_ones > vec = np.array([xs,ys,zs,np.ones((len(xs)))]) > ValueError: setting an array element with a sequence. > > Any suggestions as to what the problem might be? As I said, I'm having > problems duplicating it in "toy" programs. > > Thanks in advance. > > /s/ > Pat > > Pat, plot_wireframe (and plot_surface as well) can be very tricky to use. Typically, the way to go about it is through a parametric approach. For example, if I wanted a wireframe of a sphere, I would create two arrays of u and v (azimuth and elevation) and use that to create x, y, z (assuming constant r). The key to making these surfaces work is that the order of the array elements is very important because the plotting function uses this information to link up neighboring points. Could you please post a self-contained version of your code that demonstrates the problem? Ben Root -- Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] plot_wireframe
Just trying to get familiar with mplot3d's functions, and I've run into a problem with plot_wireframe that I'm having problems running down (or duplicating, for that matter). I'm trying to generate plots of some wavelet functions, so I need to plot values against time and scale. I've generated three numpy arrays: X (time), Y (scale) (generated these using meshgrid), and Z (values, a rather sparse matrix). I verified that all of these are the same shape (7x100) by fetching the 'shape' attribute from X,Y,Z. However, when I call plot_wireframe(), I get this error: Exception in Tkinter callback Traceback (most recent call last): File "C:\Python26\lib\lib-tk\Tkinter.py", line 1410, in __call__ return self.func(*args) File "C:\Python26\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 212, in resize self.show() File "C:\Python26\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 215, in draw FigureCanvasAgg.draw(self) File "C:\Python26\lib\site-packages\matplotlib\backends\backend_agg.py", line 314, in draw self.figure.draw(self.renderer) File "C:\Python26\Lib\site-packages\matplotlib\artist.py", line 46, in draw_wrapper draw(artist, renderer, *args, **kwargs) File "C:\Python26\lib\site-packages\matplotlib\figure.py", line 773, in draw for a in self.axes: a.draw(renderer) File "C:\Python26\lib\site-packages\mpl_toolkits\mplot3d\axes3d.py", line 135, in draw for col in self.collections] File "C:\Python26\Lib\site-packages\mpl_toolkits\mplot3d\art3d.py", line 163, in do_3d_projection self._segments3d] File "C:\Python26\lib\site-packages\mpl_toolkits\mplot3d\proj3d.py", line 211, in proj_trans_points return proj_transform(xs, ys, zs, M) File "C:\Python26\lib\site-packages\mpl_toolkits\mplot3d\proj3d.py", line 193, in proj_transform vec = vec_pad_ones(xs, ys, zs) File "C:\Python26\lib\site-packages\mpl_toolkits\mplot3d\proj3d.py", line 184, in vec_pad_ones vec = np.array([xs,ys,zs,np.ones((len(xs)))]) ValueError: setting an array element with a sequence. Any suggestions as to what the problem might be? As I said, I'm having problems duplicating it in "toy" programs. Thanks in advance. /s/ Pat -- Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] plot_wireframe and Axes3D
Hi. I am currently using *plot_wireframe* to create 3D wireframe images. Is there any way to add a color gradient to these types of figures similar to the image in this link: http://www.gams.com/solvers/matlab.gif ? If this cannot be accomplished with the *plot_wireframe* function, is there an alternative method for creating 3D meshes that can have a color gradient? Additionally, the tick labels on the 3D plots i am making intersect with the frame of the plotting area. Is there a way to add more space between the plotting area and these ticks to clean up the image? Thanks for your help, ryan - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
