CODEWITHSUNDEEP
matlabmatrix
Tori Dang
Tori Dang

Reputation: 45

plot diagonal slices of a 3D matrix with imagesc()

I'm new to Matlab and I really need help with the following problem:

I have a 255 x 255 x 255 matrix and I would like to plot its 2D slices with imagesc().

I understand that for plotting slices parallel to the x, y, z planes I could just specify the slice with something like matrix(:,:,i), but how would I do that if I want to plot the x = y slice, or in general any x = n*y slice?

What I'm thinking is to interpolate the matrix to those planes and then extract the slice, but I'm a little stuck on how.

Specifically for the x = y slice I've been trying to build a 2D matrix by using the diag() command for each z slice and by setting the new_matrix = matrix(i,i,:) for i=1:255, but that didn't seem to be working.

Upvotes: 0

Views: 377

Answers (1)

bla
bla

Reputation: 26069

for that Matlab gave you slice !

[X,Y,Z] = meshgrid(-5:0.2:5);
V = X.*exp(-X.^2-Y.^2-Z.^2);

[xsurf,ysurf] = meshgrid(-2:0.2:2);
zsurf = xsurf/2+ysurf/2;
slice(X,Y,Z,V,xsurf,ysurf,zsurf)

enter image description here

and you can play with the camera view angle to emulate the imagesc feel, fir example try view(0, 90) after the code I wrote...

By the way... if you insists on doing the cut and using imagesc the way you wanted, this is how with the example I gave:

for n=1:size(X,1)
    D(:,n)=squeeze(V(n,n,:));
end
imagesc(D)

Upvotes: 3

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