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Re: [Matplotlib-users] Fuzzy plots of ode solutions
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From: Jesse B. <jbe...@gm...> - 2008-12-16 03:58:20
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Passing 'bevel' to solid_joinstyle works. Thanks for the help. -Jesse On Mon, Dec 15, 2008 at 12:03 PM, Michael Droettboom <md...@st...> wrote: > In the meantime, I was able to get everything working and could confirm. > > Passing solid_joinstyle='bevel' does resolve the problem on both 0.91.x and > 0.98.x. Additionally, path simplification (which is a new feature on > 0.98.x) also resolves this problem (set rcParam path.simplify to True). > > The wider question is: > > a) should bevel be the default going forward? > b) maybe this deserves a FAQ entry > > Mike > > Jesse Berwald wrote: >> >> I compiled the code with following: >> >> gcc -o testode.o testode.c -lm -lgsl -lgslcblas >> >> I'm using gsl 1.10. Hope that helps. I'll try out the kwarg suggestions >> asap. >> >> Thanks for the help, >> -Jesse >> >> On Mon, Dec 15, 2008 at 9:38 AM, Michael Droettboom <md...@st...> >> wrote: >> >>> >>> I'm having trouble getting your C code to compile (maybe a gsl version >>> mismatch...?) >>> >>> In the meantime, perhaps you could try something for me. >>> >>> If you add the kwarg "solid_joinstyle='bevel'" or >>> "solid_joinstyle='round'" >>> to your plot command, does that improve things? If so, we could consider >>> changing the default. >>> >>> Cheers, >>> Mike >>> >>> mtcoder wrote: >>> >>>> >>>> All, >>>> Thanks for the quick and informative responses. I've attached the code >>>> (testode.c). It requires the GSL library. I've also attached the script >>>> I >>>> was using to read and plot the data (odetest.py). [Note: If you do any >>>> tests >>>> with the python script make sure to change the savefig directory in >>>> plot() >>>> to something local. ] >>>> >>>> http://www.nabble.com/file/p20996825/testode.zip testode.zip test code >>>> >>>> John: I'm using evince to view pdf's (but acroread produces the same >>>> behavior as Michael's attachments showed). >>>> Michael: I changed the backend to Cairo and saved the figures directly >>>> to >>>> pdf. Same results. To be clear, to do this I changed the matplotlibrc >>>> file >>>> (backend GTKAgg -> Cairo) and then changed the filename in savefig to >>>> end >>>> with ".pdf". I assume that is what you had in mind. >>>> In addition, as requested here are two screenshots in png format of the >>>> actual pylab/matplotlib output: >>>> >>>> http://www.nabble.com/file/p20996825/odetest_pylabimg.png >>>> odetest_pylabimg.png output >>>> http://www.nabble.com/file/p20996825/odetest_pylabimg_zoom.png >>>> odetest_pylabimg_zoom.png output zoomed. >>>> Thanks for the help, >>>> -Jesse >>>> >>>> >>>> Michael Droettboom-3 wrote: >>>> >>>> >>>>> >>>>> Also -- for mtcoder: >>>>> >>>>> Can you send us the script that generates your plot? >>>>> >>>>> Also, if you set your backend to Cairo, and then generate the pdf, to >>>>> you >>>>> get the same result? >>>>> >>>>> Cheers, >>>>> Mike >>>>> >>>>> Michael Droettboom wrote: >>>>> >>>>> >>>>>> >>>>>> There's something funny going on with line caps, maybe? It looks like >>>>>> the corners aren't getting capped in the same way as Agg does. >>>>>> >>>>>> I've created screenshots of Jesse's pdf file in acrobat and evince. >>>>>> >>>>>> Any thought, Jouni? >>>>>> >>>>>> Cheers, >>>>>> Mike >>>>>> >>>>>> John Hunter wrote: >>>>>> >>>>>> >>>>>>> >>>>>>> On Thu, Dec 11, 2008 at 11:16 PM, mtcoder <jbe...@gm...> wrote: >>>>>>> >>>>>>> >>>>>>> >>>>>>>> >>>>>>>> http://www.nabble.com/file/p20970084/testode.rk45.a0.99.eps1e-07.pdf >>>>>>>> testode.rk45.a0.99.eps1e-07.pdf . This comes from a completely >>>>>>>> deterministic >>>>>>>> ode. But is looks like I've added a tiny amount of noise. >>>>>>>> >>>>>>>> On a technical note, I'm running Ubuntu 8.04, python2.5.1, >>>>>>>> matplotlib0.91.2 >>>>>>>> (with GTKAgg backend). >>>>>>>> >>>>>>>> (Hopefully I didn't miss a similar question--and solution--elsewhere >>>>>>>> in the >>>>>>>> forum.) >>>>>>>> >>>>>>>> >>>>>>> >>>>>>> My guess is that you may be seeing the antialiasing of your pdf >>>>>>> renderer. matplotlib has a pretty good antialiasing renderer for the >>>>>>> screen display (antigrain) but your mileage may vary for your pdf >>>>>>> renderer. Since pdf is a vector output, we have no control over the >>>>>>> renderering. What pdf viewer are you using? The best way for us to >>>>>>> see what you are seeing is to take a PNG screenshot of your PDF file >>>>>>> displayed in your viewer and then post the PNG. Ie, here is what I >>>>>>> am >>>>>>> seeing in the Preview app: the fuzziness is from the antialiasing, >>>>>>> but >>>>>>> I am used to seeing this. >>>>>>> >>>>>>> >>>>>>> ------------------------------------------------------------------------ >>>>>>> >>>>>>> >>>>>>> >>>>>>> ------------------------------------------------------------------------ >>>>>>> >>>>>>> >>>>>>> >>>>>>> ------------------------------------------------------------------------------ >>>>>>> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, >>>>>>> Nevada. >>>>>>> The future of the web can't happen without you. Join us at MIX09 to >>>>>>> help >>>>>>> pave the way to the Next Web now. Learn more and register at >>>>>>> >>>>>>> >>>>>>> http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ >>>>>>> >>>>>>> >>>>>>> ------------------------------------------------------------------------ >>>>>>> >>>>>>> _______________________________________________ >>>>>>> Matplotlib-users mailing list >>>>>>> Mat...@li... >>>>>>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>>> ------------------------------------------------------------------------ >>>>>> >>>>>> >>>>>> >>>>>> ------------------------------------------------------------------------ >>>>>> >>>>>> >>>>>> ------------------------------------------------------------------------ >>>>>> >>>>>> >>>>>> >>>>>> ------------------------------------------------------------------------------ >>>>>> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, >>>>>> Nevada. >>>>>> The future of the web can't happen without you. Join us at MIX09 to >>>>>> help >>>>>> pave the way to the Next Web now. Learn more and register at >>>>>> >>>>>> >>>>>> http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ >>>>>> >>>>>> ------------------------------------------------------------------------ >>>>>> >>>>>> _______________________________________________ >>>>>> Matplotlib-users mailing list >>>>>> Mat...@li... >>>>>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users >>>>>> >>>>>> >>>>> >>>>> >>>>> ------------------------------------------------------------------------------ >>>>> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, >>>>> Nevada. >>>>> The future of the web can't happen without you. Join us at MIX09 to >>>>> help >>>>> pave the way to the Next Web now. Learn more and register at >>>>> >>>>> >>>>> http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ >>>>> _______________________________________________ >>>>> Matplotlib-users mailing list >>>>> Mat...@li... >>>>> 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 >>> >>> >>> >> >> >> >> > > -- > Michael Droettboom > Science Software Branch > Operations and Engineering Division > Space Telescope Science Institute > Operated by AURA for NASA > > -- PhD Candidate Department of Mathematics Montana State University Bozeman, MT |
