[matplotlib-devel] Re: axis break

[Ralf G. <r.g...@uc...>]

Hi everyone,

Here is a script that creates a graph with a y-axis break. I went with a 
suggestion from Darren to use two axes and draw a break symbol in between 
them. The advantage of two axes is that you can pan them independently (plus 
it's probably easier). It shows roughly what I think it should look like, but 
I still have to improve a few things. So I have a few questions:

- how can I hide the y-ticks in the middle of the graph (so hide only the 
ticks on the top y-axis of the lower axes while leaving the ones at the 
bottom there?

- Can I somehow use a transAxes transform so the axis break symbol (now 
implemented as a LineCollection) stays in the same position when panning? Is 
a LineCollection the best choice? I tried with a Patch class, the problem is 
that the verts of this symbol are not connected.

> >>>>> "Ralf" == Ralf Gommers <r.g...@uc...> writes:
>
>     Ralf> Hi everyone, Guess no-one has a trick yet to put in an axis
>     Ralf> break. My question is now, should this not be on the goals
>     Ralf> list at least?
>
>     Ralf> If the developers think it is a good idea to implement this,
>     Ralf> I would like to have a go at it. As I'm not all that
>     Ralf> familiar with the matplotlib internals it would be great if
>     Ralf> someone has any ideas on how to go about it.
>
> This is not possible and is not easy.  Currently, we don't even have
> independent control of the lines that surround the white axes box (the
> left and right y-axis lines and the upper and lower x-axis lines.  It
> is a long-standing wish to be able to control these independently of
> the axes box, and this would be a good place for you to start.  See
> axis.py and axes.py.
>
> JDH

Thanks,
Ralf