MATLAB: Copy and add elements and expand array

arraycell arraysMATLAB

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..

Best Answer

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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