[Matplotlib-users] Re: Contour plots

[John H. <jdh...@ac...>]

>>>>> "Chris" == Chris Barker <Chr...@no...> writes:

    Chris> Perry Greenfield wrote:

    >>> Actually, I believe that the low level contour engine we are
    >>> using supports this. It takes 2-d arrays for both x and y that
    >>> represent the x and y coordinates of the array being contoured
    >>> and generates plotting points based on those x and y
    >>> arrays. These arrays allow for irregular grids.

    Chris> completely irregular? or only orthogonal structured
    Chris> grids. From your description, it sounds like the
    Chris> later. Could it take an unstructured set of (x,y,z) points
    Chris> and contour the z values?

The latter, I believe.  The contouring routine was implemented by
Nadia Dencheva (CCd on this mail) and is based on a gist routine.  You
can read more about the core routine at
http://scipy.net/cgi-bin/viewcvsx.cgi/*checkout*/scipy1/xplt/src/gist/gcntr.c?rev=HEAD&content-type=text/plain.

The contour routines have been checked into CVS.  A simple example can
be found in examples/contour_demo.py in CVS.  We have some rudimentary
support for labeling (auto-legend and/or brute-force use of the text
command).  It would be nice to develop a point and click labeling
widget and/or an auto-labeling routine.  Contributors of course always
welcome!

JDH