thank you very much!
sara
--- Maarten buis <[email protected]> ha scritto:
> --- Wanli Zhao <[email protected]> wrote:
> > The data looks like follows:
> >
> > firm dept product
> > 1 a a, b
> > 1 b c, r
> > 1 c d, a
> > 2 d d, f
> > 2 e I, y
> > 2 f g
> >
> > Firm 1 & 2 each has some departments. Each
> department has some
> > products. I want to a variable which lists all the
> products a firm
> > has (a, b, c, d, r for firm 1) and for firm 2 (d,
> f, I, y, g).
>
> *----------- begin example --------------
> set more off
> drop _all
>
> input firm str1 dept str4 product
> 1 a "a, b"
> 1 b "c, r"
> 1 c "d, a"
> 2 d "d, f"
> 2 e "I, y"
> 2 f "g"
> end
>
> /*value one for the first department in each firm*/
> /*value two for the second department in each firm*/
> /*etc*/
> bys firm: gen deptnum = _n
>
> /*store maximum number of department in local
> `Ndepts'*/
> sum deptnum, meanonly
> local Ndepts = r(max)
>
> /*products of the first department are in variable
> products1*/
> /*products of the second department are in variable
> products2*/
> /*etc*/
> reshape wide product dept, i(firm) j(deptnum)
>
> /*loop over departments*/
> gen prods = product1
> forvalues i = 2/`Ndepts' {
> replace prods = prods + ", " + product`i'
> }
>
> /*bring the data back into original long format*/
> reshape long dept product, i(firm) j(deptnum)
>
> /*show the result*/
> list, clean
> *-------------- end example ----------------
> (For more on how to use examples I sent to the
> Statalist, see:
> http://home.fsw.vu.nl/m.buis/stata/exampleFAQ.html )
>
> Hope this helps,
> Maarten
>
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
>
> visiting address:
> Buitenveldertselaan 3 (Metropolitan), room Z434
>
> +31 20 5986715
>
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
>
>
>
>
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