On Mon, Oct 6, 2008 at 10:56 AM, Eric Firing <efir...@hawaii.edu> wrote:
> Christopher Barker wrote:
>
>> David Goldsmith wrote:
>>
>>> I feel like I must be missing something
>>>
>>
>> yup -- though it's an understandable miss...
>>
>
> I think the longstanding separation between the figure.dpi and the
> savefig.dpi is a continual gotcha that we can and should eliminate. Savefig
> should use the figure dpi, so that what is saved corresponds to what is on
> the screen, unless explicitly overridden. One way to reduce the problem,
> with what I hope is an adequate level of backwards compatibility, would be
> to have the savefig.dpi default to a special flag setting that means "track
> the figure.dpi". For example, savefig.dpi could be the string, 'screen', by
> default. This could still be overridden by a numerical rcParams setting, or
> by the explicit dpi kwarg setting in savefig() or print_figure().
>
> There are still other highly confusing dpi things internally--such as a
> renderer.dpi setting that is ignored during rendering.
>
> Comments?
>
This appears to have never been "fixed" (though I see no opposition
expressed looking back at the original thread in the archive) - having
forgotten about it and the fact that, at the time, it sent me running to
PIL, I got bitten by it again (luckily I had a vague recollection of this
thread before posting the same problem again and making a complete ass outta
myself). I'm not sure if I have the bleeding edge version of MPL, but as
I'm now working on the second different computer I've had since the OP, I'm
pretty sure I'm running a later version than I was back then. Did this
issue ever mature into a ticket?
DG
>
> Eric
>
>
>
>>
>> Attached are the results on my computer (see usage details below).
>>> Granted, I'm increasing the resolution each iteration,
>>>
>>
>> you are increasing the resolution of the figure, and of your calculations,
>> but NOT of the output image. The hint was that every image was the same
>> size: 1200X900 , which is 12"x9" at 100 dpi.
>>
>> It turns out that print_figure() doesn't respect the figures (native DPI),
>> it defaults to 100 dpi, but you can override it:
>>
>> > canvas.print_figure("test"+str(DPI)+"dpi.png", dpi=DPI)
>>
>> Then you'll get what I think you want.
>>
>> Maybe this will help:
>>
>> http://www.scipy.org/Cookbook/Matplotlib/AdjustingImageSize
>>
>> though it there, I talked about Figure.savefig(). I don't know if there is
>> a difference between that and Figure.print_figure()
>>
>> -Chris
>>
>>
>>
>
>
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