Actually, You might want to check out axes_grid module in the mpl_toolkits.
After a quick perusal, I think InsetLocator might be what you are looking
for in the axes_grid module.

http://matplotlib.sourceforge.net/mpl_toolkits/axes_grid/users/overview.html

I hope this helps,
Ben Root

On Thu, Jun 10, 2010 at 8:54 AM, Eamon Caddigan <eamon.caddi...@gmail.com>wrote:

> Actually, since axes are created with normalized coordinates, what I
> really need is a way to query the size of the current figure, in
> pixels.
>
> On Thu, Jun 10, 2010 at 7:43 AM, Eamon Caddigan
> <eamon.caddi...@gmail.com> wrote:
> > Thanks Scott. In order to precisely position an image using separate
> > axes, I'd need to be able to query and set the margin between the
> > bounding box and the actual axes. I can't seem to find any way to do
> > that, either.
> >
> > On Thu, Jun 10, 2010 at 1:13 AM, Scott Sinclair
> > <scott.sinclair...@gmail.com> wrote:
> >>>On 10 June 2010 07:21, Eamon Caddigan <eamon.caddi...@gmail.com> wrote:
> >>> I'd like to draw thumbnails of images on various plots, e.g., a bar
> >>> chart with a picture placed at the base of the bar, or a scatter plot
> >>> with photos next to select points.
> >>>
> >>> Reading and resizing the image aren't an issue. However, I've been
> >>> searching all day, and I can't figure out how to call imshow without
> >>> it taking over the axis in which its drawn.
> >>
> >> You could try using separate axes for your images, as in
> >>
> http://matplotlib.sourceforge.net/examples/pylab_examples/axes_demo.html
> >>
> >> Cheers,
> >> Scott
> >>
> >>
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