I think that this is a nice addition to the hexbin function. At first, I didn't 
quite understand the documentation of the "C" functionality, but the new 
hexbin_demo2.py example makes everything clear.

In theory, if reduce_C_function is len, then this gives the usual hexbin 
result. It may be a good idea to add this to the docstring to help clarify how 
C,reduce_C_function works.

Thanks!


--Michiel.


--- On Sat, 7/26/08, John Hunter <[EMAIL PROTECTED]> wrote:

> From: John Hunter <[EMAIL PROTECTED]>
> Subject: Re: [matplotlib-devel] hexbin extension
> To: "Andrew Straw" <[EMAIL PROTECTED]>
> Cc: "matplotlib development list" <matplotlib-devel@lists.sourceforge.net>, 
> [EMAIL PROTECTED]
> Date: Saturday, July 26, 2008, 5:18 PM
> On Sat, Jul 26, 2008 at 3:37 PM, Andrew Straw
> <[EMAIL PROTECTED]> wrote:
> > Hi all,
> >
> > I've added some functionality to my copy hexbin,
> and I thought I'd
> > bounce it off folks (esp. Michael) to see if it seems
> like a good idea
> > to add it to MPL.
> 
> Do you mean Michiel, the hexbin author?  I m CC-ing him.
> 
> 
> > Here's the beginning of the docstring of the new
> version. What I've
> > added is the optional argument "C" --
> inspired by scatter's "c" argument.
> >
> >> call signature::
> >>
> >>   hexbin(x, y, C = None, gridsize = 100, bins =
> None,
> >>          xscale = 'linear', yscale =
> 'linear',
> >>          cmap=None, norm=None, vmin=None,
> vmax=None,
> >>          alpha=1.0, linewidths=None,
> edgecolors='none'
> >>          reduce_C_function = np.mean,
> >>          **kwargs)
> >>
> >> Make a hexagonal binning plot of *x* versus *y*,
> where *x*,
> >> *y* are 1-D sequences of the same length, *N*. If
> *C* is None
> >> (the default), this is a histogram of the number
> of occurences
> >> of the observations at (x[i],y[i]).
> >>
> >> If *C* is specified, it specifies values at the
> coordinate
> >> (x[i],y[i]). These values are accumulated for each
> hexagonal
> >> bin and then reduced according to
> *reduce_C_function*, which
> >> defaults to numpy's mean function (np.mean).
> (If *C* is
> >> specified, it must also be a 1-D sequence of the
> same length
> >> as *x* and *y*.)
> >
> > What do you think? I've also implemented a simple
> demo making use of
> > this functionality and an image of the output of the
> demo. For my own
> > selfish reasons, I'd love if we could stick this
> in 0.98.3, but I'm also
> > happy to hold off to get the release out the door.
> 
> The functionality looks really nice.  I don't really
> have a problem
> sneaking it in -- I'm a softie -- but  we should hear
> from Michiel
> first. I am still waiting to hear from Sandro about his
> sphinx problem
> before trying to release anything anyhow.
> 
> JDH


      

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