MATLAB: Reshape array 3 variables into 2

arrayreshape

Hi,

I have an array of A=1x100x50.

How can I reshape it in B=100×50?

I have tried with

B=reshape(A,[100, 50]);

But I get the error message

Error using reshape To RESHAPE the number of elements must not change.

Thanks in advance for your reply.

Best Answer

B = squeeze(A)

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

B = reshape(A,size(A,2),[]);

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MATLAB: I want to divide one vector to two vectors that complement each other .. How to obtain all possible combinations of these 2 vectors

You could use the FEX submission ALLCOMB by Jos for this. E.g.,

x = your original vector of non-negative integers
c = cellfun(@(y)0:y,num2cell(x),'uni',false);
A = allcomb(c{:});
B = bsxfun(@minus,x,A);

The rows of A and B contain all of the possibilities. The usual caveat applies here ... if you have too many numbers with values that are too high this will blow up your memory and you will need to solve your problem a different way.

ALLCOMB can be found here:

https://www.mathworks.com/matlabcentral/fileexchange/10064-allcomb-varargin-

MATLAB: From kron to repmat and reshape

Perhaps:

Z = 2; 
W = 3; 
A = 5;
a = rand(Z, W);
b  = squeeze(a(:,1)); 
c1 = kron(b, ones(A,1)) * ones(1,A);    % "b" instead of "a"?!
c2 = reshape(permute(repmat(reshape(a(:,1), [1,1,2]), A, A), [2,3,1]), [], A);

Best Answer

Related Solutions

MATLAB: I want to divide one vector to two vectors that complement each other .. How to obtain all possible combinations of these 2 vectors

MATLAB: From kron to repmat and reshape

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