MATLAB: How to plot a 3D surface from N by 3 matrix

3d plots

I have a matrix with dimensions N by 3, for example 100 rows and 3 columns. Each row correspondds to the 3D location of a point, i.e., we have 100 points. I want to pot the 100 points and connect them as a surface.

Best Answer

Try,

S = size(matrix);                      %"matrix being your generic matrix
[X, Y] = meshgrid(1:S(2), 1:S(1));
Z = matrix;                            %e.g. 100 by 3 matrix
surf(X,Y,Z)

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MATLAB: How to scat 3D Matrix with value as color

I found this solution, but its quik and dirty:

z = zeros(3,3,3);
z(2,2,2) = 1;
x=[];
y=[];
z=[];
for c = 1:size(z,3)
    for b = 1:size(z,2)
        for a = 1:size(z,1) 
            x(end+1) = a;
            y(end+1) = b;
            z(end+1) = c;
        end
    end
end
scatter3(x,y,z,50,z(:));

MATLAB: How to surfplot from xyz coordinates

A = [1, 1, 1
 2, 1, 2
 3, 1, 3
 1.1, 2, 4
 2.2, 2, 5
 3.3, 2, 4
 1.2,3,3
 2.4, 3,2 
 3.6, 3, 1] ;
x = A(:,1); y = A(:,2) ; z = A(:,3) ;
dt = delaunayTriangulation(x,y) ;
tri = dt.ConnectivityList ;
trisurf(tri,x,y,z)

Best Answer

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MATLAB: How to scat 3D Matrix with value as color

MATLAB: How to surfplot from xyz coordinates

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