# Re: st: Problem creating multiple loops

 From "Carlos Eduardo Hernández Castillo" To statalist@hsphsun2.harvard.edu Subject Re: st: Problem creating multiple loops Date Fri, 13 Jun 2008 12:45:29 -0500

```Hi. I reckon this should work:

forvalues byear = 1993(1)2002 {
forvalues cont = 1(1) 4 {
local year=`byear'+`cont'
gen var1_`cont' = ln(((var1_`year'-var1_`byear')/var1_`byear')+1) if
year==`byear'
}
}

On Fri, Jun 13, 2008 at 12:29 PM, Hugh Colaco <hmjc66@gmail.com> wrote:
> Hi,
>
> I realize that my earlier post a couple of days ago was not very
> clear. So, here is another try. I need a more efficient code than the
> one below. I tried various combinations of -local-, -foreach- and
> -forval-, but am unable to get it right.
>
>
>       gen var1_1 = ln(((var1_1994-var1_1993)/var1_1993)+1) if year==1993;
>
>       gen var1_2 = ln(((var1_1995-var1_1993)/var1_1993)+1) if year==1993;
>
>       gen var1_3 = ln(((var1_1996-var1_1993)/var1_1993)+1) if year==1993;
>
>       gen var1_4 = ln(((var1_1997-var1_1993)/var1_1993)+1) if year==1993;
>
>
>       replace var1_1 = ln(((var1_1995-var1_1994)/var1_1994)+1) if year==1994;
>
>       replace var1_2 = ln(((var1_1996-var1_1994)/var1_1994)+1) if year==1994;
>
>       replace var1_3 = ln(((var1_1997-var1_1994)/var1_1994)+1) if year==1994;
>
>       replace var1_4 = ln(((var1_1998-var1_1994)/var1_1994)+1) if year==1994;
>
>
>       ............
>
>       ............
>
>       ............
>
>       replace var1_1 = ln(((var1_2003-var1_2002)/var1_2002)+1) if year==2002;
>
>       replace var1_2 = ln(((var1_2004-var1_2002)/var1_2002)+1) if year==2002;
>
>       replace var1_3 = ln(((var1_2005-var1_2002)/var1_2002)+1) if year==2002;
>
>       replace var1_4 = ln(((var1_2006-var1_2002)/var1_2002)+1) if year==2002;
>
>
> --
> Hugh
> *
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```