<>
What is your intent in the second line of the first loop? Are you checking
whether `x' is part of the " analytes_bootstrap "? If so, the returned
result is either 0 or 1...
The second loop would not receive all the results from the first loop, only
the last one. Note that the results displayed by - estat bootstrap, all- are
already there after the -bootstrap- command:
****
clear*
set obs 10000
gen x=rnormal()
bs r(p95), reps(100): /*
*/su x, d
eret li
mat l e(ci_normal)
mat l e(ci_percentile)
mat l e(ci_bc)
****
If all you want is to store them, you could take it from here without
actually displaying them...
HTH
Martin
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Gallagher, Kelly,
DOH
Sent: Mittwoch, 19. August 2009 23:46
To: [email protected]
Subject: st: bootstrap sampling and foreach
Hi, all,
Using -bootstrap-, I'd like to estimate confidence intervals for
percentiles. Also, given that I'd like to estimate C.I.s for
percentiles for a heap of variables, I'd like to use a foreach loop.
Do you have tips regarding the use of the foreach loop to save a scalar
or matrix of bootstrapped samples (which would then be used with
-estat-)?
foreach x of varlist *_u {
bootstrap r(p95), reps(1000): summarize `x', detail
local analytes_bootstrap: list x in analytes_bootstrap
return scalar `x'=`analytes_bootstrap'
}
foreach x of varlist *_u {
estat bootstrap, all
}
Thanks!!!
Kelly
Kelly Gwendolyn Gallagher, Ph.D.
Epidemiologist
Environmental Health Epidemiology Bureau
Epidemiology and Response Division
New Mexico Department of Health
1190 St. Francis Dr.
Santa Fe, NM 87502
505.476.3565
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