is it possible to integrate "vector"?

Stuart Bruff wrote: If it's a range variable, then it won't work because you can't directly use an index to get a value from a range variable. ... although, you could write a function that operates on a range variable via a for loop and returns the value, eg rvValue(rv,k):=v<-vec(rv) return v[k

Here's another, more efficient version, that works in Mathcad 14 and should work in Prime ...

It only iterates over the (implied) range variable rv elements until it has reached (implied) index k.

Stuart