Well, a rectangle is just two triangles, right? As for each point having a different value, that is not a problem. I would take a good look at the triangulation module. It is design to figure out the triangulations from an arbitrary set of data, or you can specify the triangulations yourself. You can then pass that information into any of the tri-* family of plotting functions.
···
On Sat, Dec 6, 2014 at 11:32 AM, Diego Avesani <diego.avesani@…287…> wrote:
Dear all, Dear Benjamin, Dear Sappy85,
probably I miss the meaning of structured and not-structured grid. In my grid I have only rectangular element, but they are not regular.
Here an example. In what follows you can see the x and y vector of the point of one rectangle:
X=0.1000 0.5950 0.5659 0.0951
Y=0.0 0.0 0.1839 0.0309
I would like to do as the Ben’s example (http://matplotlib.org/examples/mplot3d/trisurf3d_demo.html), but with non regular rectangles.
Moreover, in my my case each point has a different value.
Am I asking to much?
Thanks
Diego
On 5 December 2014 at 17:48, Benjamin Root <ben.root@…1304…> wrote:
I am a bit confused. Your variable is “TRI”, but you keep saying rectangles. You are also referring to unstructured rectangles, which makes zero sense to me. Do you mean triangles?
If you, matplotlib has the “tri-” family of functions and a whole module devoted to triangulation-related tasks:
http://matplotlib.org/api/tri_api.html
http://matplotlib.org/examples/pylab_examples/tricontour_demo.html
Even the mplot3d toolkit has (limited) support:
http://matplotlib.org/examples/mplot3d/trisurf3d_demo.html
I hope that helps!
Ben Root
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On Fri, Dec 5, 2014 at 11:38 AM, Sappy85 <robert.wittkopf@…83…380…> wrote:
Hi diedro,
try something like this:
import matplotlib.patches as patches
import matplotlib.pyplot as plt
fig = plt.figure()
ax = fig.add_subplot(111)
verts = [0.2,0.8], [0.1,0.5], [0.7,0.1]
poly = patches.Polygon(verts, ec=‘r’, fc=‘g’)
ax.add_patch(poly)
plt.show()
<http://matplotlib.1069221.n5.nabble.com/file/n44560/help3.png>
or this:
import numpy as np
import matplotlib
matplotlib.use(‘Agg’)
from matplotlib.patches import Polygon
from matplotlib.collections import PatchCollection
import matplotlib.pyplot as plt
fig, ax = plt.subplots()
patches =
x = np.random.rand(3)
y = np.random.rand(3)
for i in range(3):
polygon = Polygon(np.random.rand(3,2), True)
patches.append(polygon)
colors = 100*np.random.rand(len(patches))
p = PatchCollection(patches, cmap=matplotlib.cm.jet, alpha=0.4)
p.set_array(np.array(colors))
ax.add_collection(p)
plt.colorbar(p)
plt.grid()
plt.savefig(‘/var/www/img/help2.png’, bbox_inches=‘tight’,pad_inches=0.05)
<http://matplotlib.1069221.n5.nabble.com/file/n44560/help2.png>
Regards,
Sappy85
–
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