Why is my surface not fitting the data points smoothly?
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Hi,
I have a set of 125 (x,y,z) data points that are supposed to represent smooth planes. I am trying to calculate the curvature on these planes but the surfaces are not fitting the data points smoothly (please see below). I don't know why this is happening and if anyone could provide advice that would be much fantastic.
3 个评论
Star Strider
2015-1-13
The gap could be NaN values. Do you have any in your data?
Nicholas
2015-1-13
Star Strider
2015-1-13
If you have 125 data triplets, and none of them are NaN, you should have enough points to define your surface. I would use scatter3 or stem3 (that I prefer because it tells me where the x and y coordinates for a particular z are located) to see what your data look like with it. It could give you some insight into the problem.
回答（1 个）
Alessandro Masullo
2015-1-13
You can try to plot your surface with trisurf:
[x,y]=meshgrid(1:15,1:15);
tri = delaunay(x,y);
z = peaks(15);
trisurf(tri,x,y,z)
Can your problem be related to the points order?
There's also a Matlab bug related with the plot of surfaces. Try to execute opengl software, close all your windows and try again.
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