Re: [matplotlib-devel] mpl_toolkit.axes_grid default axes class should be changed?

[Jae-Joon L. <lee...@gm...>]

Thanks for your suggestion and the patch.
However, I'm not very inclined to make such a change any time soon,
since that custom axes class is one of my primary motivation
(supporting the cuvelinear grid) behind the axes_grid toolkit. And
other part of axes_grid toolkit depends on this behavior.
On the other hand, I'm trying to make some reorganization effort of
the axes_grid toolkit in the future, during which I will try to
separate out things that depends on the custom axes.

FYI, note that you can turn off the customized behavior by

  ax.toggle_axisline(False)


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

This should bring back the original behavior of the matplotlib axes
(if it does not, it should be considered a bug). Of course this will
disable some of the functionality of the axes_grid.

I'm thinking about issuing a warning (about the different behavior
from the original matplotlib) whenever axes_grid is imported
(optinally turned off using rcparams). This may help others not to
wast their time when something does not work.

Regards,

-JJ


On Tue, Oct 27, 2009 at 1:53 PM, Pauli Virtanen <pa...@ik...> wrote:
> Hi,
>
> mpl_toolkit.axes_grid.AxesGrid uses a custom axes type as the default
> type of axes it creates. I think it might be more user-friendly to use
> matplotlib.axes.Axes as the default -- the functionality in basic use
> seems to be the same.
>
> The custom axes handle drawing ticks quite differently from matplotlib's
> usual Axes. I just spent an hour wondering why
>
>        grid[0].xaxis.get_major_ticks()[-1].label.set_horizontalalignment("right")
>
> had no effect -- the answer is that LocatableAxis draws ticks using a
> custom tick artist, and that the correct axis object is in
> grid[0].axes["bottom"]. And in fact, it cannot adjust the align of
> individual tick labels.
>
> The AxesGrid is really useful, so I'd suggest the following change:
>
> --- lib/mpl_toolkits/axes_grid/axes_grid.py.orig        2009-10-27 19:51:43.000000000 +0200
> +++ lib/mpl_toolkits/axes_grid/axes_grid.py     2009-10-27 19:52:13.000000000 +0200
> @@ -210,10 +210,10 @@
>
>
>         if axes_class is None:
> -            axes_class = LocatableAxes
> +            axes_class = maxes.Axes
>             axes_class_args = {}
>         else:
> -            if isinstance(axes_class, maxes.Axes):
> +            if issubclass(axes_class, maxes.Axes):
>                 axes_class_args = {}
>             else:
>                 axes_class, axes_class_args = axes_class
>
> --
> Pauli Virtanen
>
>
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