MATLAB: How to repeat rows of matrix

insertmatrixrows

Hi,
I have a matrix and a vector indicating how many times the corresponding lines in the matrix should appear. I'd like to turn this into a single matrix.
For example:
 M= 1 2   V=1
    2 3     2
    4 3     1
    2 4     2
should become
 M =1 2
    2 3
    2 3
    4 3
    2 4
    2 4
Does anyone have advice on how to accomplish this? Many thanks.

Best Answer

One way:
f = @(k) repmat(M(k,:), round(V(k)), 1);
MM = cell2mat(arrayfun(f, (1:length(V))', 'UniformOutput', false));
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