Plot 3D binary matrix as surface (or how to get 3D matrix coordinates)

Oscar Ramos Soto

2020 6 30

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test.mat

Hi! I got a binary 650x512x128 matrix (Let's say it's called A) that represents 128 images of a curve segmentation of size 650x512 that I want to plot as a continuous surface.

I tried using isosurface, but it seems like a scattered points that doesn't make contact between each other, so that ain't look like a surface.

I tried also to get coordinates of all points and then plot using plot3 and it works, but points are not conected, here is my code:

[x,y,z] = ndgrid(1:size(A, 1), 1:size(A, 2), 1:size(A, 3)); %get coordinates of all points
xx = x(A == 1); %keep only coordinates for A == 1 
yy = y(A == 1); %these 3 lines also reshape the 3d array
zz = z(A == 1); %into column vectors
plot3(xx, yy, zz, '-'); 

Thanks in advance to everyone.

EDIT: I've attached the test.mat file that includes the 3D matrix.

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KSSV 2020-7-1

Are you looking for slice?

Oscar Ramos Soto 2020-7-1

在 MATLAB Online 中打开

Maybe the answer provided by you guys wasn't the right one, but you helped me to clarify some things. I found the answer using the following code based no the one provided by Sargondjani.

[x,y,z] = ndgrid(1:size(V, 1), 1:size(V, 2), 1:size(V, 3)); %get coordinates of all points
xx = reshape(x(V == 1),[],1); %keep only coordinates for V == 1 
yy = reshape(y(V == 1),[],1); %these 3 lines also reshape the 3d array
zz = reshape(z(V == 1),[],1); %into column vectors
T = table(xx,yy,zz);
f = fit([T.zz, T.yy],T.xx,'linearinterp');
plot(f)