Re: [Matplotlib-users] Displaying several points with different colors

[Matthieu B. <mat...@gm...>]

I manage to do what I wanted to do, it was not that easy - the colours were
in an array I had to transform into an array of tuples, the autoscale did
not function, I had to put in the fig.subplot the correct xlim and ylim -,
but now it works like a charm.
Many thanks.

Matthieu

2007/3/9, John Hunter <jd...@gm...>:
>
> On 3/9/07, Matthieu Brucher <mat...@gm...> wrote:
>
> > What I have is a set of points in a numpy.array - for instance size
> (2000,
> > 2) -. What I have as well is a nump.array of size (2000, 3). How can I
> make
> > plot understand that each line of the set points must be painted with
> the
> > corresponding line in the colour array ?
>
> You'll probably want to use a regular poly collection, as in the
> example below.  Your array of facecolors can pretty much be whatever
> you want:
>
> from pylab import figure, nx, show, cm
> from matplotlib.collections import RegularPolyCollection
>
>
> fig = figure()
> ax = fig.add_subplot(111)
>
> offsets = nx.mlab.rand(20,2)
> facecolors = [cm.jet(x) for x in nx.mlab.rand(20)]
> black = (0,0,0,1)
>
> collection = RegularPolyCollection(
>     fig.dpi,
>     numsides=5, # a pentagon
>     rotation=0,
>     sizes=(50,),
>     facecolors = facecolors,
>     edgecolors = (black,),
>     linewidths = (1,),
>     offsets = offsets,
>     transOffset = ax.transData,
>     )
>
> ax.add_collection(collection)
>
> show()
>
>
>
>
>
>
>
> > Matthieu
> >
> >
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