 # hot to draw a line connecting a list of points

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 = 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)
ly.append(pt)
x,y = np.array([lx, ly])
line = mlines.Line2D(x, y, lw=5., alpha=0.4)

plt.show()

which produces on line instad of two.

thanks for any pointers
robert

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 = 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)
ly.append(pt)
x,y = np.array([lx, ly])
line = mlines.Line2D(x, y, lw=5., alpha=0.4)

plt.show()

which produces on line instad of two.

thanks for any pointers
robert

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Hi Robert,

robert rottermann, on 2011-07-21 11:25, wrote:

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

Unless there were other considerations for getting this plot, it
really didn't have to be this complicated, read on.

···

On 20.07.2011 20:49, robert rottermann wrote:
> frame1 = plt.gca()
> lx = []
> ly = []
> for pt in ((267, 140), (380, 773), (267, 958)):
> lx.append(pt)
> ly.append(pt)
> x,y = np.array([lx, ly])
> line = mlines.Line2D(x, y, lw=5., alpha=0.4)