concatenate vertically along the 3rd dimension of a matrix

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Varshini Guddanti
Varshini Guddanti 2016-7-14
评论： piyush kant 2022-7-15
I have a matrix which has these 3rd dimensions. A(:,:,1), A(:,:,2), A(:,:,3)
Now, I wanted these three to be vertically concatenated .
I know this: vertcat(A(:,:,1), A(:,:,2), A(:,:,3));
I wanted to know other solutions as the no.of 3rd dimensions seem to change for every loop.
Thanks

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回答（3 个）

Guillaume
Guillaume 2016-7-14
splitA = num2cell(A, [1 2]); %split A keeping dimension 1 and 2 intact
vertcat(splitA{:})
Andrei Bobrov
Andrei Bobrov 2016-7-14
reshape(permute(A,[2,1,3]),size(A,2),[])'
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Image Analyst
Image Analyst 2016-7-14
Not sure what you mean by saying you have a matrix with these planes along the third dimension A(:,:,1), A(:,:,2), A(:,:,3)? They are already along the third dimension. For example they could be the red, green, and blue color channels of an RGB image. To concatenate 2d arrays along the third dimension, so
array3d = cat(3, array2da, array2db, array2dc, array2dc, .....);
for as many 2D arrays as you have.
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Varshini Guddanti
Varshini Guddanti 2016-7-14
编辑：Varshini Guddanti 2016-7-14
Yeah, I want to concatenate the third dimensions vertically to display a figure.
Previously, I had done it using vertcat and cat but I donot want it to be done manually, but, I want to concatenate each 3rd dimension matrix generated in a loop to be concatenated vertically.
Image Analyst
Image Analyst 2016-7-14
Explain why vercat and cat are manual and a for loop is not manual.

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