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Re: st: capturing estimated means and standard errors into a new data set
From
Nick Cox <[email protected]>
To
[email protected]
Subject
Re: st: capturing estimated means and standard errors into a new data set
Date
Tue, 15 May 2012 23:56:46 +0100
I've not tried to understand the details here, but it sounds like a
case for -statsby-.
Nick
On Tue, May 15, 2012 at 11:53 PM, Kevin Geraghty <[email protected]> wrote:
> I am sure many have confronted this problem:
>
> I have a variable with some partition of subgroups defined , and want to capture the mean of that variable and accompanying standard error, for each value of the subgroup partition, into a stata data set.
>
> I have written code to confront this problem pulling data out of the returned matrices and dumping it into a temporary dset, but it is frankly pretty ugly and I am hoping someone can show me a more economical way to do this.
>
> Here's what I have. note that "plat" is the name of the partition variable which defines subgroups. I am using the complex survey version of the mean command, but I believe the problem is identical with the standard version of the mean command:
>
> tempfile outfile
> local testvar <name of variable of interest>
>
> svy: mean `testvar', over(plat) level(90)
> preserve
> clear
> matrix fu = e(b)'
> local vplatnames: rowfullnames fu
> local plats: subinstr local vplatnames "`testvar':" "", all
> svmat fu, names(col)
> rename y1 `testvar'_mean
> format `testvar'_mean %9.3f
> gen int plat=.
> local i 0
> foreach plat of local plats {
> replace plat = `plat' in `++i'
> }
> save `outfile', replace
>
> clear
> matrix var = vecdiag(e(V))'
> local vplatnames: rowfullnames var
> local plats: subinstr local vplatnames "`testvar':" "", all
> svmat var, names(col)
> replace r1 = sqrt(r1)
> rename r1 `testvar'_sd
> format `testvar'_sd %9.6f
> gen int plat=.
> local i 0
> foreach plat of local plats {
> replace plat = `plat' in `++i'
> }
> merge 1:1 plat using `outfile', nogenerate
> save `outfile', replace
> restore
>
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