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Re: st: string variable
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: string variable
Date
Fri, 3 Aug 2012 08:41:12 +0100
My guess is that -wtmean()- is written for some version of Stata --
say around Stata 5 -- sufficiently old that by an old misfeature it
behaves as if the quotation marks were stripped on parsing. I wrote an
FAQ on this about 10 or 12 years ago, but can't find it using only a
phone.
Your solutions include
to rewrite -wtmean()-
to -encode- your string variable and work with the corresponding
numeric variable (this is probably closest to what else you are doing)
to write a loop using -summarize- and -replace-
to use -statsby-.
Nick
On 3 Aug 2012, at 06:14, "Fabian Schönenberger" <[email protected]> wrote:
Dear Statalist
I try the following commands:
. levelsof SIZEBM,local(levels)
`"BH"' `"BL"' `"BM"' `"SH"' `"SL"' `"SM"'
foreach l of local levels {
egen meanwreturn_`l'=wtmean(trt1m) if SIZEBM=="`l'",weight(size) by
(datemt)
}
BH not found
r(111);
wtmean is from SSC.
SIZEBM is a string variable, generated with the command
egen SIZEBM=concat(SIZE BM)
It seems the problem is not the foreach, but the term -
SIZEBM=="`l'" -
Any ideas the solve the problem highly appreciated.
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