functions handle for a summation over n elements

Hello!

I'm new to function handles and I find it difficult to solve the following problem. I would like to define a function

f=@(X) (X(1)-X(2))^2 + (X(2)-X(3))^2 + ... + (X(n-1)+X(n))^2

where X is a n-dimensional vector.

As n may be large, I will end up with a problem: Obviously I don't want to type n addents! Is there an easy way to overcome this problem?

Thanks!

Regards Fred

Answer 1

[Azzi Abdelmalek]

f=@(x) sum(diff(x).^2)

[Fred]

Wow, that was quick :D

Thank you!