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Re: st: Database problem

From   Nick Cox <>
Subject   Re: st: Database problem
Date   Sat, 8 Dec 2012 00:20:33 +0000

My experience is contrary to both your inclinations.

1. -reshape long- will make it easier to sort out date order, so you
need not worry about dates beforehand. (Besides when you say "merge",
you presumably don't mean -merge-, but something else.)

2. I see no loop being needed  here. As before, I envisage -rename-
and -reshape-.


On Fri, Dec 7, 2012 at 7:36 PM, roland andersson <> wrote:

> I will do that, but before changing to the long stucture I think it
> could be easier to merge the observation with the same date. This
> means that if to datecolumns are equal I would like to merge the
> corresponding content columns. How can I write a loop that compares
> every var9 var12; var12 and var15 and if equal merge var8 and var11
> and so on.
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