[matplotlib-devel] Initialising projections in matplotlib

2011-09-15 Thread Phil Elson

Hi, 

I would like the ability to setup a plot projection in MPL that can be defined 
by various parameters and does not need to be serialised as a string and 
registered with matplotlib.projections.register_projection.  For example, an 
extension of /examples/api/custom_projection_example.py might be to add the 
ability to define the central meridian to an arbitrary value rather than the 
current value of 0 - in this case I would expect to define the projection by 
creating an object which can then be turned into a matplotlib axes:

hammer_proj = Hammer(central_meridian=45)
ax = plt.subplot(111, projection=hammer_proj)

I have made a change to matplotlib which would enable this capability, which 
can be found at 
https://github.com/PhilipElson/matplotlib/commit/9c7b1b27d0245a752d010bd03ae66dc6c000d8e499
 . Any feedback and thoughts would be really appreciated with the ultimate goal 
of getting this functionality into MPL.

Many Thanks,

Philip
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Re: [matplotlib-devel] Initialising projections in matplotlib

2011-09-15 Thread John Hunter
On Thu, Sep 15, 2011 at 1:19 PM, Phil Elson  wrote:
> I have made a change to matplotlib which would enable this capability, which
> can be found at
> https://github.com/PhilipElson/matplotlib/commit/9c7b1b27d0245a752d010bd03ae66dc6c000d8e499
> . Any feedback and thoughts would be really appreciated with the ultimate
> goal of getting this functionality into MPL.


I'm getting a 404 error when I try that URL.  The preferred method of
contribution is to submit a pull request

http://matplotlib.sourceforge.net/devel/gitwash/development_workflow.html#asking-for-your-changes-to-be-merged-into-the-main-repo

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Re: [matplotlib-devel] Initialising projections in matplotlib

2011-09-15 Thread Phil Elson

Sorry, that link was bad, it should have read:

https://github.com/PhilipElson/matplotlib/commit/9c7b1b27d0245a752d010bd03ae66dc6c000d8e4




To: [email protected]
Date: Thu, 15 Sep 2011 18:19:49 +
Subject: [matplotlib-devel] Initialising projections in matplotlib








Hi, 

I would like the ability to setup a plot projection in MPL that can be defined 
by various parameters and does not need to be serialised as a string and 
registered with matplotlib.projections.register_projection.  For example, an 
extension of /examples/api/custom_projection_example.py might be to add the 
ability to define the central meridian to an arbitrary value rather than the 
current value of 0 - in this case I would expect to define the projection by 
creating an object which can then be turned into a matplotlib axes:

hammer_proj = Hammer(central_meridian=45)
ax = plt.subplot(111, projection=hammer_proj)

I have made a change to matplotlib which would enable this capability, which 
can be found at 
https://github.com/PhilipElson/matplotlib/commit/9c7b1b27d0245a752d010bd03ae66dc6c000d8e499
 . Any feedback and thoughts would be really appreciated with the ultimate goal 
of getting this functionality into MPL.

Many Thanks,

Philip
  

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Re: [matplotlib-devel] Initialising projections in matplotlib

2011-09-15 Thread Benjamin Root
On Thu, Sep 15, 2011 at 1:19 PM, Phil Elson  wrote:

>  Hi,
>
> I would like the ability to setup a plot projection in MPL that can be
> defined by various parameters and does not need to be serialised as a string
> and registered with *matplotlib.projections.register_projection*.  For
> example, an extension of /examples/api/custom_projection_example.py might be
> to add the ability to define the central meridian to an arbitrary value
> rather than the current value of 0 - in this case I would expect to define
> the projection by creating an object which can then be turned into a
> matplotlib axes:
>
> *hammer_proj = Hammer(central_meridian=45)
> ax = plt.subplot(111, projection=hammer_proj)
> *
>
>
> I have made a change to matplotlib which would enable this capability,
> which can be found at
> https://github.com/PhilipElson/matplotlib/commit/9c7b1b27d0245a752d010bd03ae66dc6c000d8e499.
>  Any feedback and thoughts would be really appreciated with the ultimate
> goal of getting this functionality into MPL.
>
> Many Thanks,
>
> Philip
>
>
Hmm, interesting idea.  I took a quick look through the code, and it touches
on some fragile parts of axes.py, so I wouldn't be comfortable with this
being in v1.1.0, but I think it is definitely worthy of further
investigation.

As a bit of a selfish interest, I think your approach might open up a
possible approach for a long-standing problem of mine with 3d projections.
Axes3D objects want to fill its entire plot box, but when created through a
subplot mechanism, the defaults get over-ridden.  I wonder if this approach
with _init_axes() passing kwargs might provide me with the hook to fix this.

Ben Root
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