Re: [Matplotlib-users] Fuzzy plots of ode solutions

[John H. <jd...@gm...>]

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.