Re: [Matplotlib-users] hot to draw a line connecting a list of points

[robert r. <ro...@re...>]

who ever migth be interested:
I achieved my goal in drawing lines trough a set of points using the path modul.

http://matplotlib.sourceforge.net/users/path_tutorial.html

robert
On 20.07.2011 20:49, robert rottermann wrote:
> hi there,
>
> I would like to draw a a set of lines on top of an image.
> Somehow I do not get the result I want
>
> these are the points ((267, 140), (380, 773), (267, 958))
>
> one of my divers atempts is:
>
> pic = plt.imread('../hlwd/effizienz_balken_01.jpg')
> pic = np.fliplr(np.rot90(pic, k=2))
> plt.imshow(pic)
>
> frame1 = plt.gca()
>
> lx = []
> ly = []
> for pt in ((267, 140), (380, 773), (267, 958)):
>       lx.append(pt[0])
>       ly.append(pt[1])
> x,y = np.array([lx, ly])
> line = mlines.Line2D(x, y, lw=5., alpha=0.4)
>
> frame1.add_line(line)
>
> plt.show()
>
> which produces on line instad of two.
>
> thanks for any pointers
> robert
>
>
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