Thanks Reinier, Yes, upgrading to 0.99.1 seems to have fixed the problem. One slight oddity: the package I downloaded from the SF page linked at [2] had a filename of matplotlib-0.99.1.2.tar.gz however inside the tarball is a directory named matplotlib-0.99.1.1 and the PKG-INFO file also says 0.99.1.1 Perhaps a packaging bug?
thanks again, -Derek On Wed, Jan 27, 2010 at 2:59 AM, Reinier Heeres <rein...@heeres.eu> wrote: > Hi Derek, > > I just tried your program with the latest svn version and that seems > to work fine, so I'd suggest you try that as well [1]. It looks to me > like the fix should be present in 0.99.1-2 too [2]. > > Please let me know if you still run into the same problem. > > Cheers, > Reinier > > [1] http://matplotlib.sourceforge.net/faq/installing_faq.html#install-from-svn > [2] > http://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-0.99.1/ > > On Wed, Jan 27, 2010 at 3:08 AM, Derek Schuff <dsch...@purdue.edu> wrote: >> Hi all, >> I'm getting strange errors trying to use the bar3d method in mplot3d >> (I'm using matplotlib 0.99.0 in Ubuntu 9.10 and Python 2.6). >> I'm doing something roughly like the example at >> http://matplotlib.sourceforge.net/examples/mplot3d/hist3d_demo.html >> I've pasted my sample program below, which has 2 cases: In case 1, you >> see just what you would expect: 2 rows of bars with increasing size in >> the y direction. if you uncomment case 2 (for different bar heights), >> you get the following error: >> >> Traceback (most recent call last): >> File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_gtk.py", >> line 352, in expose_event >> self._render_figure(self._pixmap, w, h) >> File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_gtkagg.py", >> line 75, in _render_figure >> FigureCanvasAgg.draw(self) >> File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_agg.py", >> line 314, in draw >> self.figure.draw(self.renderer) >> File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 46, >> in draw_wrapper >> draw(artist, renderer, *kl) >> File "/usr/lib/pymodules/python2.6/matplotlib/figure.py", line 774, in draw >> for a in self.axes: a.draw(renderer) >> File "/usr/lib/pymodules/python2.6/mpl_toolkits/mplot3d/axes3d.py", >> line 135, in draw >> for col in self.collections] >> File "/usr/lib/pymodules/python2.6/mpl_toolkits/mplot3d/art3d.py", >> line 334, in do_3d_projection >> z_segments_2d.sort(reverse=True) >> ValueError: The truth value of an array with more than one element is >> ambiguous. Use a.any() or a.all() >> >> This error gets thrown any time the 2 bars in the same y position have >> exactly the same z value: in the sample program the (0,0) value and >> (0,1) value are both 1 but it works for any of the 4 pairs. The error >> is particularly confusing. even looking at the source of the sort line >> in the backtrace, it's not clear where any arrays are being used as >> truth values. (just compared for the sort). This can be worked around >> by adding a tiny delta to the z values in one of the rows: it only >> errors when the corresponding z values match exactly. >> Am I doing something wrong here? or is this some kind of bug in the >> drawing code? >> thanks, >> -Derek >> >> the program: >> #!/usr/bin/env python2.6 >> import matplotlib.pyplot as plot >> import mpl_toolkits.mplot3d >> import numpy >> fig2 = plot.figure() >> ax2 = mpl_toolkits.mplot3d.Axes3D(fig2) >> xpos = numpy.asarray([0, 1, 2, 4, 0, 1, 2, 4]) >> ypos = numpy.asarray([0, 0, 0, 0, 1, 1, 1, 1]) >> zpos = numpy.zeros_like(xpos) >> dx = 0.05 * numpy.ones_like(zpos) >> dy = numpy.ones_like(zpos) >> #case 1 >> dz = numpy.asarray([1,2,3,4,5,6,7,8]) >> #case 2 >> #dz = numpy.asarray([1,2,3,4,1,6,7,8]) >> ax2.bar3d(ypos, xpos, zpos, dy, dx, dz, color='b') >> ax2.set_xlabel('X') >> ax2.set_ylabel('Y') >> ax2.set_zlabel('Z') >> plot.show() >> >> ------------------------------------------------------------------------------ >> The Planet: dedicated and managed hosting, cloud storage, colocation >> Stay online with enterprise data centers and the best network in the business >> Choose flexible plans and management services without long-term contracts >> Personal 24x7 support from experience hosting pros just a phone call away. >> http://p.sf.net/sfu/theplanet-com >> _______________________________________________ >> Matplotlib-users mailing list >> Matplotlib-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/matplotlib-users >> > > > > -- > Reinier Heeres > Tel: +31 6 10852639 > ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
