I think what the responders have in mind is simply outputting files in a
different format, e.g. png, which is rasterized. One alternative you might
consider is using code written by Tom Robataille called rasterized_scatter.
It automatically rasterizes your data points. You can find it on github.
Jon
On Sat, Mar 22, 2014 at 4:39 PM, <
matplotlib-users-requ...@lists.sourceforge.net> wrote:
> From: Christopher Kuhlman <ckuhl...@vbi.vt.edu>
> To: Goyo <goyod...@gmail.com>
> Cc: matplotlib-users <matplotlib-users@lists.sourceforge.net>
> Date: Sat, 22 Mar 2014 16:38:59 -0400 (EDT)
> Subject: Re: [Matplotlib-users] how to reduce the file size of plots
> generated with matplotlib
> Thank you both for your fast replies. (Just an aside, plotting all the
> points is a quick way to detect outliers.)
>
> Before I sent the email, I tried to find a simple raster command in
> matplotlib to do just that (convert the image to raster), but I could not
> find one in my search. Is there such a thing?
>
> Thanks again.
>
> c
>
> ----- Original Message -----
> From: "Goyo" <goyod...@gmail.com>
> To: "Christopher Kuhlman" <ckuhl...@vbi.vt.edu>
> Cc: "matplotlib-users" <matplotlib-users@lists.sourceforge.net>
> Sent: Saturday, March 22, 2014 4:11:08 PM
> Subject: Re: [Matplotlib-users] how to reduce the file size of plots
> generated with matplotlib
>
> 2014-03-22 20:23 GMT+01:00 Christopher Kuhlman <ckuhl...@vbi.vt.edu>:
> [...]
> > For example, most recently, I am plotting 3 data sets; each data set has
> about 90,000 points. If I plot all three sets in one PDF figure, the file
> size is over 2MB.
> > This seems absurd to me. I used R plotting for many years (again, my
> own homegrown code, for 6 years) and never had this issue, and I was making
> these kinds of plots/figures.
> >
> > I thought it may be a vector/raster issue, but the following web page
> says that PDF are generated as vector image, which, to my understanding
> (which could be wrong), is the more compact format.
> > http://matplotlib.org/faq/usage_faq.html
> [...]
>
> Roughly speaking, size of vector files depend on the number of points
> while size of raster files depends on the number of pixels. For your
> use case (many points, small images) raster output should be more
> compact.
>
> Goyo
>
--
________________________________________________________
Jonathan D. Slavin Harvard-Smithsonian CfA
jsla...@cfa.harvard.edu 60 Garden Street, MS 83
phone: (617) 496-7981 Cambridge, MA 02138-1516
fax: (617) 496-7577 USA
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