Add a vector in another vector

Question

hamed 2018-5-28

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/402877-add-a-vector-in-another-vector

评论： hamed 2018-5-28

Hello all,

I have a vector (for example A=rand(1,100);) and I would like to add another vector which is B=zeros(1,10); to A before each index that I want.

For instance, I would like to add vector B in vector A before index 5. The result should be a vector with 110 elements which the first four elements are the same as first four elements of A then I should have 10 zeros then all elements of vector A after the fifth element. I hope my question be clear enough.

Thanks a lot.

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Answer 1

Rik 2018-5-28

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https://ww2.mathworks.cn/matlabcentral/answers/402877-add-a-vector-in-another-vector#answer_322229

在 MATLAB Online 中打开

The code below should work.

A=rand(1,100);
B=zeros(1,10);
wanted_index=5;
if wanted_index==1
    result=[B A];
elseif wanted_index>numel(A)
    result=[A B];
else
    result=[A(1:(wanted_index-1)) B A(wanted_index:end)];
end