[Matplotlib-users] Reworked axis('scaled')

[Mark B. <ma...@gm...>]

Hello all -

I finally found time to fix the axis('scaled') feature.
It is now consistent when zooming, as requested.
In essence, it works the same as axis('equal'), but fixes the
lower-left-hand corner rather than the center of the
subplot. When using axis('scaled') the _autoscaleon is
set to False, so that axis limits will be fixed when
features are added to the figure. You can overwrite this
by setting it the regular way (also works for axis('equal'))
ax.set_autoscale_on(False).

My last modification is a prototype implementation of
zooming when two axes are linked. The idea behind this
is that when an axis is 'equal' or 'scaled' and another
axis is linked to this axis, that when you are zooming and
changing the size of the subplot, then the size of the
linkes axis should change accordingly. I use this when
I am contouring 2D horizontal data and have a vertical
cross-section linked to the x-axis of the horizontal plot.
When I zoom in on the horizontal plot, the length of the
linked axis now gets changes too! Works great, actually,
but has been implemented for linked x-axis only for now.
It works when zooming in the horizontal data (which
has axis 'equal'), but not yet when zooming in the
linked vertical cross-section. Still working on it.

Anyway, I modified 3 files, which I submitted on the patches
page. If anybody is interested, download these and let me
know what you think. I presume they'll get implemented in
CVS when John or others find the time to do so.

Mark