copy and add elements and expand array

OKG
2019 2 13
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更新时间：2019 2 13
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Hello everyone. I have a question.
I have an array which has 500 elements such as A = [1,2,3,4,5,6,7...500]
And I want to copy last values of the each dual arrays and add them after dual arrays like that --> B = [1,2,2,3,4,4,5,6,6,7,8,8,.....,500]
How can I do this?
Thanks..

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madhan ravi
madhan ravi 2019-2-13
编辑：madhan ravi 2019-2-13

2 个投票

A=1:500;
B=zeros(1,numel(A)+floor(numel(A)/2));
B(3:3:end)=A(2:2:end);
B(setdiff(1:numel(B),3:3:end))=A

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