MATLAB: Delete rows in 3d-matrix

3d matrixdelete rows

Hi all,

How can I delete a row in a 3d matrix? I want to delete the upper row in the matrices: stuff(:,:,1:3)

 stuff(:,:,1(:,1))=[]

doesn't work..

"Unbalanced or unexpected parenthesis or bracket."

Does anyone know the answer? Thanks.

Cheers,

Best Answer

Thought about this last night in bed and couldn't understand the stupid mindtwist I made, it's just simply:

 stuff(1,:,:)=[]

And indeed it's the upper slice. My bad. Thanks anyway!

Related Solutions

MATLAB: How to copy first column, and replace other columns with this first column values in same array in MATLAB? (array size can vary)

"copy what ever is in the first column (first column will have each row with different values and have n number of rows in it), and replace the 5th column, 9th column, 13th column etc till all columns are over."

Why didn't you just say that in the first place?

A(:,5:4:end)=repmat(A(:,1),1,numel(A(1,5:4:end)));

As far as the colon expression see doc colon and then experiment at the command line to see what you get...nothing will blow up, I promise (other than you may see a lot of numbers if A is very large, so you might want to play with small sample arrays for ease)

MATLAB: 3D-matrix

A "matrix" is 2D. In consequence a "3D matrix" cannot store anything.

As long, as you do not specify exactly, what you want, it is impossible to give a valuable answer. But of course I can guess, that you want a CELL matrix:

M_coord = {[1,1,1], [1,2,1], [1,3,1]; ...
           [2,1,1], [2,2,1], [2,3,1]; ...
           [3,1,1], [3,2,1], [3,3,1]}

Or perhaps a 3D array:

M_coord = cat(3, [1,1,1; 2,1,1; 3,1,1], ...
                 [1,2,1; 2,2,1; 3,2,1], ...
                 [1,3,1; 2,3,1; 3,3,1]);

Best Answer

Related Solutions

MATLAB: How to copy first column, and replace other columns with this first column values in same array in MATLAB? (array size can vary)

MATLAB: 3D-matrix

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