How can I find the difference between values in an array with an index spacing of 2?

Apologies for the basic question.

If I had x=[0,5,4,3,7,9,2,4,7,9]

And I wanted to find the difference between values with a spacing of 2:

I.e. the difference between 0 and 4, 5 and 3, 4 and 7, 3 and 9, 7 and 2 etc...

Returning [4,-2,3,6,-5,-5,5,5] ... How would I go about doing that?

Answer 1

[James Tursa]

Hint: Look at x(1:2:end) and x(2:2:end). If x has an even number of elements, you could reshape(x,2,[]) and then look at some of the diff( ) options.