matplotlib-devel Mailing List for matplotlib

On 10/01/2010 03:59 PM, Stan West wrote:
> Hi, developers. I stumbled upon this when I noticed that gist_stern_r
> isn't the reverse of gist_stern. As the attached script shows, the
> discontinuity in red is wrong, and green stays zero instead of ramping.
> The problem seems to be that when cm.revcmap() reverses a linear segment
> map spec (such as {'red': [(0, 0, 0), (0.5, 1, 1), (1, 1, 1)], ...}), it
> doesn't swap the second and third elements of each tuple—the color
> values facing in each direction. That makes no difference for continuous
> colormaps but distorts discontinuous maps such as gist_stern. I believe
> that the attached "cm.patch" file fixes the problem.
>
> The other patch, "_cm.patch", is only aesthetic after the above patch is
> applied. It changes an element of the gist_stern colormap spec that
> should have been unused but which caused the green channel to stay at
> zero with the old revcmap. With the patched revcmap, the changed element
> should not be used, but the colormap spec will look like most others
> with the second and third elements of the tuple being equal.
>

Patches committed in 8725.  Thank you.

Eric

On Sun, Oct 3, 2010 at 2:05 PM, Eric Firing <ef...@ha...> wrote:
>
>> section about this pattern to the event docs:
>>
>> http://matplotlib.sourceforge.net/users/event_handling.html
>
> Done in 8723.

Thanks!

Cheers,

f

On 10/01/2010 08:01 AM, Fernando Perez wrote:

>
> In any case, if my logic is flawed (quite likely, since I imagine M.
> D. had a good look at this), it might be worth adding a
>
> .. warning::
>
> section about this pattern to the event docs:
>
> http://matplotlib.sourceforge.net/users/event_handling.html

Done in 8723.

Eric

  On 10/2/2010 8:33 PM, Mitchell Jon Stanton-Cook wrote:
> Hello,
>
> I have been trying to modify the custom projection example
> (http://matplotlib.sourceforge.net/examples/api/custom_projection_example.html)
> to plot a Sanson Flamsteed Projection (Sinusoidal projection).

Dear Mitchell,

Can you use the 'sinu' projection in basemap? E.g. 
basemap/examples/contour_demo.py figure 1.

-Andrew

Hello,

I have been trying to modify the custom projection example 
(http://matplotlib.sourceforge.net/examples/api/custom_projection_example.html) 
to plot a Sanson Flamsteed Projection (Sinusoidal projection).

Such a projection is defined as:

long0=0
x = (long-long0)*cos(lat)
y=lat

The problem is how to correctly handle the:
* _gen_axes_patch
* _gen_axes_spines

As the resultant plot area/plot boundaries is not circular/elliptical 
like the examples provided.

Does anyone, who has played with this projections, or has better 
understanding of matplotlib provide me with a way to handle this?

Regards

Mitchell