Verifying an Vector composition

If I am having a symmetric structures vector Eg: A = [a2 a1 a3 a4 a5 a4 a3 a2 a1]

I want to check whether the vector is having a peak value at the center index and the other values are arranged in a decreasing fashion from the center. I.e. a1<a2<a3<a4<a5.

How to check this?

Answer 1

[Matt J]

issorted(A(1:ceil(end/2))) & all(A==flip(A))

[Vinay Killamsetty]

Thank you very much

Answer 2

[Scott MacKenzie]

There is probably an easier approach, but I think this works. The result of this expression is 1 if a1<a2<a3<a4<a5, or 0 otherwise

mean(diff(A(1:ceil(end/2))) > 0) == 1

[Vinay Killamsetty]

Thank you