How can I get the secondary diagonal of a matrix?

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Antonio Modugno
Antonio Modugno on 27 Oct 2020
Commented: Antonio Modugno on 27 Oct 2020
for exaple:
A=rand(5,5)
diag(A)= main diagonal of matrix A
I want to take the elements A(1,5), A(2,4), A(3,3), A(4,2), A(5,1), (secondary diagonal), and put those ones into a vector without picking each element

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Accepted Answer

Stephen23
Stephen23 on 27 Oct 2020
diag(fliplr(A))

More Answers (1)

KSSV
KSSV on 27 Oct 2020
Edited: KSSV on 27 Oct 2020
Read about diag. You can get diagonal elements by using that.
A = rand(5) ;
diag(A)
diag(A,-1)
diag(A,1)
May be you are looking for
iwant = diag(fliplr(A))

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