Howe can I subtract neighboring numbers?

Hello,

I got a matrix like this:

>> z=[1,2,3,4]

z =

1 2 3 4

How can I substract the neighboring numbers?

Like 2-1; 3-2; 4-3; etc.

And how can I divide every number by 60 ?

Like 1/60 2/60 etc

Answer 1

[Andrei Bobrov]

diff(z)
z/60

[Max Behr]

And how can I subtract the first number with 0?

>> z=[1,2,3,4]

z =

1 2 3 4

Like

1-0

2-1

3-2

4-3

?

[Andrei Bobrov]

diff([0;z(:)])

[Max Behr]

How can I change the collums and the lines?

SO the result is still from "left to right "instead of "up to down"?

[Andrei Bobrov]

diff([0,z(:)'])

or

diff([0;z])

[Max Behr]

Thanks works fine!