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st: sd() does not work with forvalues
From
Wilhelm Kluemper <[email protected]>
To
[email protected]
Subject
st: sd() does not work with forvalues
Date
Fri, 15 Jul 2011 19:20:42 +0200
Hello STATA community,
I am trying out a code where I want to create the standard deviation
of a var as a new var with a loop:
dfbeta
forvalues i = 3/85 {
egen df`i'med = median(_dfbeta_`i')
egen sddf`i'= sd(_dfbeta_`i')
gen diffmedi`i'=_dfbeta_`i'-df`i'med
gen absdiffmedi`i' = abs(diffmedi`i')
gen nosddff`i'= diffmedi`i'/sd(_dfbeta_`i')
drop if nosddff`i'>=2
}
I keep getting this message:
unknown function sd()
It works perfectly without the forvalues loop but not within. Does
anybody have a clue why that is and what I could do about it?
Thanks already
Wilhelm
--
Wilhelm Klümper
University of Göttingen
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