MATLAB Answers

reshape 4D matrix into 2D matrix

조회 수: 105(최근 30일)
Amine  Ben Ayara
Amine Ben Ayara 2016년 10월 18일
댓글: James 2016년 10월 19일
Good morning Matlab, I have a 4D-Double matrix that has this dimension: (5*5*5*30) and I need to convert it into a 2D matrix, I suppose, so the new matrix will only have the 1st Column (:,1) from each five by five matrix stacked horizontally,so the new 2D matrix should be 25 by 30 (25*30) dimension, where each column (:,1:30) is basically extracted from the original matrix (5*5*5*30) matrix. To try to explain this a bit more, I have 30 of: five sets of (5by5) matrices, and I only need the information in the first column of each set of 5*5, hence (25 rows) and 30 columns. Can Someone pleaaaaase point me in the right direction? Thank you SO much! have a great day.

답변(2개)

James
James 2016년 10월 18일
Does this do what you're looking for?
reshape(squeeze(x(:,1,:,:)),25,30)
where x is your 5x5x5x30 matrix?
  댓글 수: 2
James
James 2016년 10월 19일
Try reshape(squeeze(x(:,1,:,:)),25,[]), and see what the final size of the matrix is.

댓글을 달려면 로그인하십시오.


Walter Roberson
Walter Roberson 2016년 10월 18일
Possibly
reshape(M(:, 1, :, :), 25, 30)
Or
reshape( permute( M(:, 1, :, :), [3, 1, 4, 2]), 25, 30)
The difference is that for an A x B x C x D matrix the first would be (A*C) x D, but the second would be (C*A) x D different of elements
  댓글 수: 2
Walter Roberson
Walter Roberson 2016년 10월 18일
Please show size( MNPr1_1to30)

댓글을 달려면 로그인하십시오.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by