Re: [Matplotlib-users] filled contours, and missing data

[Todd M. <jm...@st...>]

On Tue, 2005-02-22 at 16:46, Perry Greenfield wrote:
> >   - Are Numeric and numarray MAs similar enough to be used at the
> >     C-API level, which is where agg would be checking the mask?  Does
> >     anyone know whether MAs will be part of the Numeric3 core?  I
> >     haven't seen any reference to them in the PEP.
> >
> We'll have to raise it. I imagine that they should be. As I mentioned, 
> NaNs don't solve all the problems that MA does. Since MA is layered on 
> Numeric/numarray it shouldn't be hard to do so. As far as C-API, since 
> it is a Python implementation, I presume it comes down to whether or 
> not the needed attributes are the same for the numeric and Numarray 
> variants. I'm not immediately familiar with that, but Todd should be 
> able to give a fairly quick answer on that (he did the port to 
> numarray)

As Perry said,  numarray.ma is a port of MA to numarray so they're
fairly close.  Both packages are pure Python layered over ordinary
numarray or Numeric numerical arrays.   Accessing from C,  both packages
should yield data or mask information via a method callback.  The
resulting arrays are PyArrayObjects which are source compatible only: 
extensions using MA component arrays will need to be compiled for either
Numeric or numarray as we do now for _image, _transforms, and _contour.

Todd