How can I find the difference between adjacent elements while ignoring the first value?

I have the following column vector.

data = randperm(100,15)';

Is there a way of using the "diff" function to find the difference between adjacent elements while ignoring the first one? In other words, I would like the calculation to start with elements 2 and 3 then 4 and 5 etc.

Appreciate the help! Thanks.

Answer 1

[Stephen23]

diff(data(2:end))

[KALYAN ACHARJYA]

:) 🙏

[Benjamin Horsley]

As easy as that! Thank you. Safe to say I'm still very much learning!

[Benjamin Horsley]

Sorry, just a quick follow-up question to this, @Stephen Cobeldick. If my vector has 14 elements, is there a way of returning only 7 difference values instead of 13? I mean to say I only want to find the difference between element 1 and 2 then skip ahead to elements 3 and 4 (skipping the difference between elements 2 and 3). Hope that makes sense. Again, really appreciate the feedback.

[Stephen23]

Where vec is your vector of 14 elements:

out = vec(2:2:end)-vec(1:2:end)

[Benjamin Horsley]

Terrific! Thanks, @Stephen Cobeldick!