Combining two arrays by pointwise repeating the elements of A(i), B(i) times.

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Michel
Michel 2014-10-9
编辑： Matt J 2014-10-9
I want to combine two vectors (A and B) with the same length into a new vector (C) with length sum of B.
e.g.
A = [1,2,3,4]; B = [2,1,2,3];
C = [1,1,2,3,3,4,4,4]
Thus repeating the elements of A, B times.

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回答（2 个）

Pierre Benoit
Pierre Benoit 2014-10-9
Matt J
Matt J 2014-10-9
编辑：Matt J 2014-10-9
idx(cumsum([1,B]))=ones(length(A)+1,1);
C=A(cumsum(idx(1:end-1)))

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