If I set like
vec = 100*numpy.random.random((10,3))
it does not shpw lines even with changing the set_xlimit and set_ylimit. I
guess there is something related with scaling.
Jin
---
> Date: Wed, 13 Jul 2011 16:44:01 -0400
> Subject: Re: [Matplotlib-users] Question on LineCollection
> From: jne...@gmail.com
> To: sulsj0...@hotmail.com
> CC: matplotlib-users@lists.sourceforge.net
>
> 2011/7/13 SULSEUNG-JIN <sulsj0...@hotmail.com>:
> > Thanks, Justin
> >
> > I think I made a confusing example code. Here comes new one:
>
> Maybe you just need to force a call to draw() and set your x/y limits.
> This works for me on matplotlib 1.0.1
>
> $ ipython -pylab
> # ====
> from matplotlib.collections import LineCollection
> f = figure()
> plot()
> ax = gca()
> vec = numpy.random.random((10,3))
> segs = []
> for i in range(0, len(vec)):
> x1 = vec[i][0]
> #x1 = 3000000
> x2 = vec[i][1]
> #x2 = 4000000
> y1 = y2 = vec[i][2]
> segs.extend( [[(x1,y1),(x2,y2)]] )
>
> line_segments = LineCollection(segs, linewidth=3, alpha=0.3, colors =
> 'r', linestyle = 'solid')
> ax.add_collection(line_segments)
> ax.set_xlim(0,1)
> ax.set_ylim(0,1)
> show() # hmmmm... nothing yet
> draw() # force a draw; now it works
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