how to subtract part of two different series

[Nau2306]

Hi

I am using eviews6. My question is given two series x and y each with 2000 observations, how do i subtract y from x (x-y) only for observations from 1500 to 2000 and then sum all the differences?

Thanks

[EViews Gareth]

Code: Select all

smpl 1500 2000 scalar mysum = @sum(x-y)