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Based on a quick look, I think it would be easy to make LineCollection 
and PolyCollection accept a numerix array in place of [(x,y), (x,y), 
...] for each line segment or polygon; specifically, this could replaced 
by an N x 2 array, where the first column would be x and the second 
would be y. Backwards compatibility could be maintained easily. This 
would eliminate quite a bit of useless conversion back and forth among 
lists, tuples, and arrays. As it is, each sequence of sequences is 
converted to a pair of arrays in backend_bases, and typically it started 
out as either a 2-D numerix array or a pair of 1-D arrays in the code 
that is calling the collection constructor.
Using a single 2-D array makes it easier to determine whether one is 
dealing with 'old-style' inputs or 'new-style' inputs, but it might 
still be reasonable to allow [X, Y] instead or in addition, where X and 
Y are 1-D numerix arrays.
Any objections or alternative suggestions?
Eric

I'm making an errorbar plot with assymetric errorbars. The docstring says:
xerr and yerr may be any of:
 a rank-0, Nx1 Numpy array - symmetric errorbars +/- value
 an N-element list or tuple - symmetric errorbars +/- value
 a rank-1, Nx2 Numpy array - asymmetric errorbars -column1/+column2
I think that last line should read:
	a 2xN Numpy array - asymmetric errorbars -row1/+row2
Darren

How about 'plots'? (i.e., a bunch of plot commands)
Perhaps this could also be the function that loops through multiple =20
lines. For example in matlab you can do
plot (x, y)
plot (x', y')
to plot out a grid -- the columns (or is it the rows..) are looped =20
through inside the plot command. Is this the sort of thing you have =20
in mind for the new 'parplot' command?
-Rob
On Jun 14, 2006, at 1:06 AM, Ga=EBl Varoquaux wrote:
> On Tue, Jun 13, 2006 at 05:33:57PM +0200, Ga=EBl Varoquaux wrote:
>> I find that "parplot" is not a great name for such a function, =20=
>> but I
>> cannot think of a better one. Maybe the list will have better ideas.
>
> Talking to a friend we came up with a name like "pathcolor", or
> "pathplot".
>
> 	Ga=EBl
>
>
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-----
Rob Hetland, Assistant Professor
Dept of Oceanography, Texas A&M University
p: 979-458-0096, f: 979-845-6331
e: he...@ta..., w: http://pong.tamu.edu

On Tue, Jun 13, 2006 at 05:33:57PM +0200, Ga=EBl Varoquaux wrote:
> I find that "parplot" is not a great name for such a function, but =
I
> cannot think of a better one. Maybe the list will have better ideas.
 Talking to a friend we came up with a name like "pathcolor", or
"pathplot".
	Ga=EBl