How do i extract data from 3D matrix?

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Prakash Raut
Prakash Raut on 22 Nov 2021
Answered: Voss on 23 Nov 2021
I have a matrix of size 256*256*256, i want to create a 2D matrix whose each row has information from the z direction of the original matrix, how do i do it?
  2 Comments
James Tursa
James Tursa on 22 Nov 2021
Edited: James Tursa on 22 Nov 2021
Please give us a small example of what you want. E.g., start with a 2x2x2 array and then show us the resulting 2x2 matrix you want as an output. Maybe all you need is sum(matrix,3) or mean(matrix,3), but we can't tell from what you have written so far.
Prakash Raut
Prakash Raut on 23 Nov 2021
Edited: Prakash Raut on 23 Nov 2021
Hi James,
Here is an example of what i want (only my A is 256*256*256)
>> A
A(:,:,1) =
1 2
3 4
5 6
A(:,:,2) =
7 8
9 10
11 12
A(:,:,3) =
13 14
15 16
17 18
>> iwant
iwant =
1 2 3 4 5 6
7 8 9 10 11 12
13 14 15 16 17 18

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Accepted Answer

Voss
Voss on 23 Nov 2021
[m,n,~] = size(A);
newA = reshape(permute(A,[2 1 3]),m*n,[]).';

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