colored mesh after scatter3 command

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.

[Image Analyst]

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]

I want to bring back the mesh that has the color variation obtained from the dots.

[Image Analyst]

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?

Answer 1

[KSSV]

Read about delaunayTriangulation. Also have a look on this package:

https://in.mathworks.com/matlabcentral/fileexchange/25555-mesh2d-delaunay-based-unstructured-mesh-generation

[Alberto Acri]

Thanks, but that's not what I'm looking for.

[KSSV]

Why not? What did you try?

[Alberto Acri]

I want to create like this in matlab starting from the txt file.

[KSSV]

Yes the given generates the same.

[Alberto Acri]

Really? But where should I look? There are many files inside.

[KSSV]

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.