I've run into a case where the rendering in a line plot is incomplete and some lines are not drawn at all. Basically I have a dataset (see below) where I know two points go to a value of zero. When I plot the points and do interactive pan/zoom sometimes the line going down to zero is there and sometimes not. After a bunch of playing around trying to reduce the problem to a minimum the script below is what I got. If I tried to make the 'y' array much smaller then the problem went away. I played with antialias and interactive settings with no benefit. Changing the window size can also produce the same effect I'm describing. Finally, when I use savefig to save in various formats the results varied, perhaps just a side-effect of the size of the saved figure.
I'm using Matplotlib 0.99.1.1 built from source with the TkAgg backend on CentOS-5 with python 2.6. This same problem was also evident using GtkAgg and MacOSX backends so I don't think the details of my build are relevant (but I can supply if needed). Thanks, Tom import numpy import matplotlib.pyplot as plt y = numpy.array([ 4., 2., 2., 3., 3., 2., 2., 6., 6., 5., 5., 4., 4., 7., 7., 2., 2., 4., 4., 2., 2., 2., 2., 4., 4., 4., 4., 4., 4., 7., 7., 3., 3., 5., 5., 4., 4., 5., 5., 4., 4., 7., 7., 6., 6., 2., 2., 2., 2., 5., 5., 4., 4., 4., 4., 6., 6., 3., 3., 4., 4., 3., 3., 2., 2., 3., 3., 4., 4., 4., 4., 4., 4., 6., 6., 5., 5., 4., 4., 7., 7., 3., 3., 4., 4., 4., 4., 5., 5., 4., 4., 7., 7., 3., 3., 4., 4., 4., 4., 6., 6., 4., 4., 4., 4., 4., 4., 2., 2., 5., 5., 6., 6., 3., 3., 5., 5., 4., 4., 0., 0., 5., 5., 1., 1., 4., 4., 5., 5., 4.]) plt.figure() plt.plot(y) plt.figure() plt.plot(y) plt.xlim(-7200, 6500) # Does it go down to 0 now? ------------------------------------------------------------------------------ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
