MATLAB: How to combine vectors of different length into matrix

matrixvector

Actually..what I want to do is…
I have a vector A =[ 1 2 3 4 5] and a matrix B = [3 4 5 0 0; 1 2 4 5 0; 4 5 0 0 0]
I want save setdiff(A,B(i,:)) i.e. difference of each row of B from A
[1 2] , [3], [1 2 3] into a matrix in the form of [1 2 0; 3 0 0; 1 2 3] (padding with '0')
Please help….
Thanks…

Best Answer

I would just use a for-loop and some fun indexing:
A =[ 1 2 3 4 5];
B = [3 4 5 0 0; 1 2 4 5 0; 4 5 0 0 0];
sz = size(B);
C = zeros(sz);
nkeep = -inf; %how many columns to keep?
for ii = 1:sz(1)
  temp = setdiff(A,B(ii,:));
  ncurr = numel(temp);
  nkeep = max(nkeep,ncurr);
  C(ii,1:ncurr) = temp;
end
C = C(:,1:nkeep);
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