Hi Mike, I'm using 0.98.3 with the TkAgg backend on Mac OS X.
I will update matplotlib from the site and try again. My attempt to use GtkAgg failed presumably because I don't have things set up with GTk on my Mac. best -Kaushik Michael Droettboom wrote: > 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
