MATLAB: How to convert a 1XM array into NXM array

arraycell arraysMATLAB

I have a 1×12 array, where each element is a vector of doubles (the vectors have different lengths). How can I convert to a NX12 array, where N is the length of the vector with most elements.

Best Answer

You could do this yourself, but by far the simplest solution is to download Jos's excellent padcat:

https://www.mathworks.com/matlabcentral/fileexchange/22909-padcat-varargin

If C is your 1x12 cell array, then just do this:

padcat(C{:})

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MATLAB: Combine a cell array of cell arrays to a single cell array

NewCellArray = vertcat( ExistingCellArray{:} );

MATLAB: Multiplying a 1xM vector by a KxN matrix

Use bsxfun, reshape, and permute:

>> V = [1,-1]
V =
     1    -1
>> S = [0,0,1,1; 1,1,0,0; 1,0,1,0; 0,1,0,1]
S =
     0     0     1     1
     1     1     0     0
     1     0     1     0
     0     1     0     1
>> X = bsxfun(@times,S,reshape(V,1,1,[]));
>> reshape(permute(X,[3,2,1]),[],size(S,1)).'
ans =
     0     0     0     0     1    -1     1    -1
     1    -1     1    -1     0     0     0     0
     1    -1     0     0     1    -1     0     0
     0     0     1    -1     0     0     1    -1

Best Answer

Related Solutions

MATLAB: Combine a cell array of cell arrays to a single cell array

MATLAB: Multiplying a 1xM vector by a KxN matrix

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