How can I repeat each element of a vector different times and store them in a new vector

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Yufan Miao
Yufan Miao 2013-2-19
评论： mahmoud osama 2020-3-28
Dear all,
I am a Matlab novice. I am sorry that my question may be silly.
Does anyone know that how I can repeat each element of a vector different times and then store them in a new vector?
Thank you in advance for the answers
Cheers!

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采纳的回答

Wayne King
Wayne King 2013-2-19

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Andrei Bobrov
Andrei Bobrov 2013-2-20
编辑：Andrei Bobrov 2013-2-21
r = [1 3 3 4 0 5];
x = 1:6;
t = r > 0;
a = cumsum(r(t));
b = zeros(1,a(end));
b(a - r(t) + 1) = 1;
x1 = x(t);
out = x1(cumsum(b));
Jos (10584)
Jos (10584) 2013-2-19
Wayne pointed you to a run-length decoder/encoder.
Things become more simple if every element is to be repeated the same number of times:
% repeat all elements of A N times
A = [1 2 3]
N = 3 ;
B1 = reshape(repmat(A(:).',N,1),1,[])
% or
nA = numel(A) ;
B2 = A(ceil((1:nA*N)/nA))

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