colored mesh after scatter3 command
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I have the following script where with the command "scatter3" I obtain a figure present in "object_analysis.txt" where in correspondence of the nodes I have a determined color (that varies for all the nodes of the object).
A(:,:)=load('object_an.txt');
figure
scatter3(A(:,1),A(:,2),A(:,3), 6, A(:,5:7)./255, 'filled');
grid on
axis equal
I would like to bring back the mesh (triangular elements) of this element "object" so that on the surface you can see the color variation set previously.
3 个评论
Image Analyst
2020-12-14
Not quite sure what you mean. When I run it I see a bunch of points plotted in various colors but mostly green. Do you want to see the triangle boundaries like with a Delaunay triangulation?
% Read in data
xyzValues = load('object_an.txt')
x = xyzValues(:,1);
y = xyzValues(:,2);
z = xyzValues(:,3);
% Do a 3-D scatter plot.
markerColors = xyzValues(:,5:7)/255
scatter3(x, y, z, 6, markerColors, 'filled');
% Prepare the diagram.
grid on
axis equal
title('Scatter Plot of (x, y, z)', 'FontSize', 20);
xlabel('x', 'FontSize', 20);
ylabel('y', 'FontSize', 20);
zlabel('z', 'FontSize', 20);
Alberto Acri
2020-12-14
Image Analyst
2020-12-14
Bring back WHAT mesh? Did one ever exist yet? Still not sure what you mean. Plus have have the color variation. It's in the markerColors matrix I created from columns 5-7.
Did you every try out KSSV's suggestion?
回答（1 个）
KSSV
2020-12-14
0 个投票
Read about delaunayTriangulation. Also have a look on this package:
6 个评论
Alberto Acri
2020-12-15
KSSV
2020-12-15
Why not? What did you try?
Alberto Acri
2020-12-15
I want to create like this in matlab starting from the txt file.
KSSV
2020-12-15
Yes the given generates the same.
Alberto Acri
2020-12-15
KSSV
2020-12-15
Read the documentation of delaunayTriangulation. This is pretty striaght. If you want to use the package, read the introduction part shown in the file mesh2d. There are few example, which will work out for your case.
There are also demo files which you can striaght away run and learn.
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2020-12-14
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