I'm not able to reproduce this on matplotlib SVN head with the GtkAgg backend. Which version and backend are you using?
Mike Kaushik Ghose wrote: > PS. In the code just disregard the line N = 1000 - it does nothing. > > Ghose, Kaushik wrote: > >> Hi John, >> >> OK. I've managed to pare it down to the following pattern: >> >> import pylab >> >> N = 1000 >> x = pylab.zeros(200) >> x[1] = .5 >> x[2:24] = 1.0 >> x[24] = .5 >> x[26] = -.5 >> x[27:49] = -1.0 >> x[49] = -.5 >> x = pylab.tile(x, 100) >> pylab.plot(x) >> >> >> The above code is sufficient to repeat the glitch (just resize the window to >> check this). The half-way values (0.5) are important - if we have a straight >> jump the glitch isn't visible. >> >> I'm sorry but I couldn't find path.py under >> >> /Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/ >> >> so I couldn't try it out. (Is it under a different place in mac?) >> >> thanks >> -Kaushik >> >> >> >> John Hunter wrote: >> >>> On Sat, Dec 27, 2008 at 10:29 AM, Kaushik Ghose >>> <kaushik_gh...@hms.harvard.edu> wrote: >>> >>>> Hi Gang, >>>> >>>> I was plotting some data collected from an ADC and noticed an odd aliasing >>>> issue. Please see the images on the following site. >>>> >>>> http://assorted-experience.blogspot.com/2008/12/odd-aliasing-issue-with-matplotlib.html >>>> >>>> I wonder if there is any way to avoid this kind of aliasing. I vaguely >>>> remember >>>> our old arch-foe (MATLAB) handles this gracefully. I have found >>>> matplotlib's >>>> plotting to be superior to MATLAB's in every way (except for 3D) and it >>>> would be >>>> nice if aliasing could be handled gracefully. >>>> >>> I'm almost certain this is a result of the path simplification logic. >>> Could you upload some sample data and a self contained script so we >>> can test? >>> You can test this by editing site-packages/path.py and replacing:: >>> >>> self.should_simplify = (len(vertices) >= 128 and >>> (codes is None or np.all(codes <= >>> Path.LINETO))) >>> >>> with:: >>> >>> self.should_simplify = False >>> >>> Michael, perhaps we could override path.should_simplify with an rc or >>> line property? >>> >>> >>>> Also, thanks for the excellent binary packages for Mac! >>>> >>> Thanks for testing them! >>> >> ------------------------------------------------------------------------------ >> _______________________________________________ >> Matplotlib-users mailing list >> Matplotlib-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/matplotlib-users >> > > ------------------------------------------------------------------------------ > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA ------------------------------------------------------------------------------ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
