Selecting Every Other Element in a Matrix
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Marshall Dunn
on 15 Feb 2015
Commented: Star Strider
on 8 Feb 2024
How can I select every other element in a matrix, such as A=[1 2 8 7 6 5 4 6]?
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Accepted Answer
Star Strider
on 16 Feb 2015
I’m not certain what you want, so I’ll venture two possibilities:
A=[1 2 8 7 6 5 4 6];
Aodd = A(1:2:end); % Odd-Indexed Elements
Aeven = A(2:2:end); % Even-Indexed Elements
7 Comments
Star Strider
on 8 Feb 2024
It should work the same way for complex vectors, however the problem with that is that it could select only one of a complex pair. One way to correct for that would be to use the conj function to complete the pair after selecting them, then use the cplxpair function.
You would need to decide whether you wanted to select from complex vectors to begin with. The problems that could cause might not be worth the efffort.
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