How can I find the second last value of a vector?

Is there a command that returns the second last value in a value. For example, in vector W = [1 2 3 4...n], W(end) returns n, how would I return the n-1 value? Thanks

Answer 1

[David Fletcher]

W(end-1)

[Joseph Anchores]

I just tried this and matkab says "Array indices must be positive integers or logical values."

[DGM]

What size is your variable? If you are indexing along a dimension of length 1, then you will end up trying to access the zeroth subscript -- which is not valid.

A = 27;
A(1)

ans = 27

A(end)

ans = 27

A(end-1)

Array indices must be positive integers or logical values.