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I would like to calculate a statistic for a series y, containing T observations and the statistics, say, following r1=T*t*(yT)*sum(yt-ybar)*(y1)

where (yT) represents the last observation of the series, (y1) is the first observation, ybar is the mean of the series and t represents for the time of each y.

So T=@obs(y), y1=@first(y), yT=@last(y), ybar=@mean(y)

sum(yt-ybar)=@sum(y-@mean(y))

but how to represent t in the formula?

I only knew some of VBA so still not familiar with Eviews programming.

Many many thanks!

I don't understand your question. Or, rather, as far as I can tell, you've answered it yourself.

My question is how to represent 't' in the formula?

For example, i need to know the result of the series t*yt

so when yt=y1, it is y1*1, and when yt=y2, it is y2*2

How can i programme that t?

Thanks!

Thanks!!!