vectorization problem

[dirac]

Hi again,

I am trying to do a really simple calculation where I have some vector 'a'
say. All I want to do is to find:

b = [a(i)-a(i+1)]/a(i)

Is there a way to do this by vector multiplication rather than for loops? I
can't see a way to do it because the new vector will be 1 element less than
the original vector 'a'.

Thanks

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