How do I create a vector by repeating a vector

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Onovo
Onovo 2021-7-28
评论： darova 2021-7-28
Given a Vector A=[1; 2], I want to create a vector B, such that B=[1; 2; 1; 2] . Thanks

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KSSV
KSSV 2021-7-28
编辑：KSSV 2021-7-28
Ran in:
A = [1; 2] ;
B = repmat(A,2,1)
B = 4×1
1 2 1 2

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