2D Array and Indexing with range of rows

[Engineering_in_Training]

I have a 2D array in which I want to make a subarray of it with rows 20 to 40 in order to find the slope of that range of data. 

What function is best to do so? 

[BertMcMahan]

Probably "Array Subset".

[altenbach]

You don't ever say how many columns there are and what you mean by "slope". Can we assume you have exactly two columns and they correspond to x an y, respectively?

Do you have a problem getting the Subarray or getting the slope? Both are easy to solve and if you would attach a simple VI with some typical data, we can show you.

.(with the current vague problem description we can't do that. Too many assumptions needed).