Combine 2D matrices to form 3D one in Matlab

问题

I have 3 20x2 double arrays A, B and C. I want to combine them in one 3d array D so that D(:,:,1) will return A, D(:,:,2) will return B and D(:,:,3) will return C.

回答1:

Using cat to concatenate along the third dimension might be the elegant way -

D = cat(3,A,B,C)

Here, the first input argument 3 specifies the dimension along which the concatenation is to be performed.

回答2:

Like this?

A = 1*ones(20,2);
B = 2*ones(20,2);
C = 3*ones(20,2);

D = zeros(20,2,3);  % Preallocate the D Matrix
D(:,:,1) = A;       
D(:,:,2) = B;
D(:,:,3) = C;

D(1,1,1)  % prints 1
D(1,1,2)  % prints 2
D(1,1,3)  % prints 3

来源：https://stackoverflow.com/questions/29841828/combine-2d-matrices-to-form-3d-one-in-matlab