Alan:
The figure size determines the eventual size of the figure where it will
be displayed. You should set that with "figsize=(x,y)" before you
actually plot. Then, and very importantly, you should set the DPI for
the medium where you are viewing the figure. A computer display will
probably be between 75 and 100 DPI. Then for good print quality, you
should specify a DPI larger than that, say 300 or 350 or for some
purists even to 800 when you use "savefig(...)". Then the actual number
of pixels is determined which will give the original figure size on the
chosen display medium. Note that more DPI means more pixels and a
larger file. This didn't work for me with an earlier version of mpl and
after I posted that here, it was fixed so you should be using the latest
version for the above to work.
HTH and cheers,
Wayne
Alan G Isaac wrote:
> On Mon, 28 Jan 2008, Manuel Metz apparently wrote:
>
>> fig = pylab.figure(figsize=(6,10), dpi=96)
>> [...]
>> pylab.savefig("filename.eps", dpi=96)
>>
>
> A couple questions.
>
> 1. The help for figure says that the dpi argument
> determines the "resolution". Suppose I am producing
> a PNG file for screen display: what am I changing
> when I change the dpi argument (from the point of
> view of the file, and from the point of viewer of
> the person viewing the file onscreen). More generally,
> are there standard setting recommended for onscreen
> PNG figure display?
>
> 2. EPS is a vector format, and the fig has a size.
> What role does the dpi argument play here?
>
> Thank you,
> Alan Isaac
>
>
>
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