I have a set of unstructured (x,y) points which I would like to compute a boundary polygon for. I don't want the convex hull.
I was able to use matplotlib.tri to get a Delaunay triangulation for my points by following the examples online, but I'm having trouble masking everything but the triangles with a boundary edge. Additionally, once I get this, I'm not clear on how to plot just the boundary. Here is what it seems like the mask should be, assume triang comes from matplotlib.tri.Triangulation(). mask = np.where(np.where(triang.neighbors < 0, 0, 1).all(axis=1), 1, 0) triang.set_mask(mask) but, when I plot triang using plot.triplot(), or plt.plot() to plot the edges, I am getting a bunch of extra stuff that isn't just the boundary triangles/edges. Anybody have example code for properly masking and plotting only the boundary edges? ~Luke -- "Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety." -- Benjamin Franklin, Historical Review of Pennsylvania, 1759 ------------------------------------------------------------------------------ WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
