Built-in function diff - methodology

Hi,

What methodology is used in "diff"? Does it take forward or central differences, and what is the step? How can I check the source code?

Thanks in advance!

Answer 1

[Jonathan Sullivan]

help diff
doc diff

Answer 2

[Jan]

You cannot check the code of DIFF, because it is a built-in function. As Jonathan has said already, reading the doc will reveal the internal method. It is the difference of subsequent elements.

Answer 3

[Dessislava Koleva]

Thank you for the fast responses, I guess I'll need something else for my evaluation then. Have a good day!

[Jan]

I guess you are looking for GRADIENT.

[Dessislava Koleva]

I'll check it out, yes. I was interested in the order of the error, as I'm getting slightly different numbers from those obtained by a closed form solution. (slightly = 0.002, which is a lot, in my opinion). However, thanks for the answer!