Assemble of a vector into a matrix

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Ermin Sehovic
Ermin Sehovic 2015-12-18
回答： Guillaume 2015-12-18
Which is the most effective way of assembling vector v into matrix A, such that matrix A is obtained? (Without using for loops).
v = [1;2;3;4;5;6;7;8;9],
What the assembly is supposed to look like:
A = [1;2;3;0;0;0;0;0;0 , 0;0;0;4;5;6;0;0;0 , 0;0;0;0;0;0;7;8;9].
Matrix A is a 9x3 matrix.

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回答（1 个）

Guillaume
Guillaume 2015-12-18
v = [1;2;3;4;5;6;7;8;9];
vv = mat2cell(v, ones(numel(v)/3, 1) * 3, 1);
A = blkdiag(vv{:})

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