Re: st: Loops and counter

[George Vega Yon <g.vegayon@gmail.com>]

gen total = a1 * b1 * 365.24
forval i = 2/14 {
    replace total = total + a`i' * b`i' * 365.24
}
replace total = total/(z * 365.24)

Cheers!

George Vega Yon
7 647 2552
http://cl.linkedin.com/in/georgevegayon


2013/3/22 Thomas Speidel <thomas@tmbx.com>:
> I am trying to shorten the following expression in Stata:
>
> gen total = ((a1 * b1 * 365.24) + (a2 * b2 * 365.24) + ... +  (a14 * b14 *
> 365.24)) / (z * 365.24)
>
> Where a1-a14, b1-b14, z are all continuous variables.
> Typing the expression in full is time consuming. I seem to recall I should
> be using a loop with a counter to cycle through every value 1-14. However, I
> am not sure how to do that.
>
> Thanks.
>
> --
> Thomas Speidel
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