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Re: Re: Re: st: RE: RE: Changes of the dataset


From   n j cox <n.j.cox@durham.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: Re: Re: st: RE: RE: Changes of the dataset
Date   Wed, 05 Oct 2005 13:41:43 +0100

My original solution was overkill, although it worked.

gen long newid = _n
reshape wide price, i(newid) j(buyer) string
renpfix price
drop newid

is a simpler solution. The criterion is that the
variables in -i()- uniquely identify the observations.
Here this is true by construction.

My last comment on my previous posting still stands.

Nick
n.j.cox@durham.ac.uk

I.A.C. van de Snepscheut

You understood my problem very well the first time, your output was
exactly what I wanted to have. Only I made my example a litte bit
simpler with less variables. You must think of the same situation only
the variables are not only price colour age id and buyer, but also a
couple of other variables (in total something like 30 variables). I
put all my variables between the brackets after i (just like you did)
and than stata gave an error. The number of variabeles is too high.
Than I tried and the maximum number of variables appeared to be 10, so
that is a problem. Now my question was do you have a solution for this
problem?

n j cox

> Sorry, I thought that I understood what your problem was.
> Now that you have changed the problem to this vaguer
> one I don't have a clear enough picture to advise, except
> in a backwards manner: if your data don't allow a -reshape-
> solution, that may not really be a good idea.
>
> It seems entirely possible that your original data structure
> may in fact be best overall for what you want to do. You
> just need to get fluent with -by:-, -collapse- and some other
> commands.
>
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