Obtaining Original Data from diff series

[alirezan321]

Hi There,

This is something that can easily be done in Excel, but I couldn't figure how to do it in Eview.
Assume I have a series y and I generate another series dy = y - y(-1). The question is if I only know the initial value of y, how I can reconstruct y from the dy series?

Thanks,
Ali.

[startz]

Hi There,

This is something that can easily be done in Excel, but I couldn't figure how to do it in Eview.
Assume I have a series y and I generate another series dy = y - y(-1). The question is if I only know the initial value of y, how I can reconstruct y from the dy series?

Thanks,
Ali.

enter the initial value of y. Then

Code: Select all

smpl 2 @last
y = dy + y(-1)

[alirezan321]

Thanks a lot.
Is it possible to write this as a link object, so it would automatically update itself if dy changes?

[EViews Gareth]

Unfortunately since you need an initial value for Y, you can not express Y as an automatically updating formula.

[alirezan321]

Is it possible to define a sequence of commands as a Macro? And then run the Macro with new parameters.

[EViews Gareth]

You can write a program...