Hi everybody,
I am trying to plot a triangular grid from a textfile using triplot, but all
I get is some wired straight line
code:
import numpy as np
import matplotlib.pyplot as plt
x, y = np.loadtxt('points.dat', unpack=True)
triangles = np.loadtxt('triangles.dat', dtype=np.int32)
plt.triplot(x, y, triangles, 'go-')
Thanks
http://old.nabble.com/file/p29815755/points.dat points.dat
http://old.nabble.com/file/p29815755/triangles.dat triangles.dat
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Your triangulation consists of just two triangles, the first with vertices (0, 0) (0.1, 0.1) (0.1, 0.1) and the second (0, 0), (0.1, 0.1), (0, 0). Each of these triangles has duplicate vertices and is therefore a straight line.
In fact you only have three distinct points in your points.dat file, at (0, 0), (0.05, 0.05), and (0.1, 0.1). You can never construct a triangle which isn’t a straight line with these points. Perhaps you intended your points.dat file to be something like
0 0
0 0.05
0 0.1
0.05 0
0.05 0.05
0.05 0.1
0.1 0
0.1 0.05
0.1 0.1
Ian
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On 27 September 2010 15:37, radfahrer <clemens@…3297…> wrote:
I am trying to plot a triangular grid from a textfile using triplot, but all
I get is some wired straight line