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Description
Bug report
Bug summary
When running the code below to plot the surface for the equation 1 - y/x, the plot works but I get an error and the rendering of the surface breaks when viewed from some angles.
Code for reproduction
importmathimportnumpyasnpimportmatplotlibasmplimportmatplotlib.pyplotaspltimportmatplotlib.tickerfrommatplotlibimportcmfrommpl_toolkits.mplot3dimportAxes3D# Generate the datax=np.linspace(-1.0,1.0,50)y=np.linspace(-1.0,1.0,50)z=np.zeros(len(x))x,y=np.meshgrid(x,y)z=1-y/xz[z>=5.0]=5.0# Clips top of surfacez[z<=-5.0]=-5.0# Clips bottom of surface# place NaNs at the discontinuitypos=np.where(np.abs(np.diff(z))>=5.0)z[pos]=np.nan# Create the plotp1=plt.figure()ax=p1.gca(projection='3d')surf=ax.plot_surface(x,y,z,rstride=1,cstride=1,cmap=cm.coolwarm,linewidth=0,vmin=np.nanmin(z),vmax=np.nanmax(z),antialiased=False)plt.title("1 - y/x")ax.set_xlim(-1.0,1.0)ax.set_ylim(-1.0,1.0)ax.set_zlim(-5.0,5.0)ax.set_xlabel("x")ax.set_ylabel("y")ax.set_zlabel("z")p1.show()raw_input("Press any key to close all plots: ")
Actual outcome
/usr/lib/pymodules/python2.7/matplotlib/colors.py:576: RuntimeWarning: invalid value encountered in less cbook._putmask(xa, xa < 0.0, -1)Odd rendering issues appear:
Expected outcome
I'd expect to not get errors and to not see the rendering issue. I am using older versions of virtually everything, and this may be a platform-specific issue. Or I may be using this code in a way it was not intended to be used, in which case if there is a more-correct way to do this I'd appreciate someone showing me how to do it.
Matplotlib version
- Operating system: Ubuntu 14.04
- Matplotlib version: 1.3.1
- Matplotlib backend (
print(matplotlib.get_backend())): 'TkAgg' - Python version: 2.7.6
- Jupyter version (if applicable): N/A
- Other libraries: