Extract 2D matrix from 3D matrix with different lengths.

I have 17x8x94059 class-double matrix. i.e 3D matrix., say "B"

Now I would like to extract 17x94059 elements and make it a 2D matix having a new variable name, say "A".

The command like

A = squeeze(B(:,1,:));

did not work.

Moreover I want to extract all 8-values from 17x8x94059 matrix in a similar way.

such that I can make a loop something like,

for i = 1:8
A = squeeze(B(:,i,:))
end

Any suggestions?

Answer 1

[Stephen23]

For just one matrix use either

A = reshape(B(:,1,:),17,[]);

or

A = permute(B(:,1,:),[1,3,2]);

For all of the matrices, it is not required to use a loop:

C = num2cell(permute(B,[1,3,2]),1:2)

Using permute and num2cell is about 30% faster than using a loop (the test file is attached):

Elapsed time is 1.09111 seconds.  % loop
Elapsed time is 0.718072 seconds. % num2cell

[Megha]

Yes, It got my answer!

Thanks @Stephen Cobeldick