Parsing results from boot
This probably has a super easy answer...but I claim newbie status! (I did search help lists but this question is hard to isolate keyword-wise) Basically, I'm trying to figure out how to parse the results from executing boot(). I'm mainly interested in assigning the standard error estimate to a scalar variable. For example: --------------------------------------------------------------
b<-c(100,100,120,130,1000,1200,1100,1150,125) b.boot <- boot(b, function(b,i) median(b[i]), R=1000) b.boot
ORDINARY NONPARAMETRIC BOOTSTRAP
Call:
boot(data = b, statistic = function(b, i) median(b[i]), R = 1000)
Bootstrap Statistics :
original bias std. error
t1* 130 354.75 450.9763
------------------------------------------------------------------ I'm interested in the value for std.error (i.e. 450.9763). Now executing the folling: ------------------------------------------------------------------
summary(b.boot)
Length Class Mode t0 1 -none- numeric t 1000 -none- numeric R 1 -none- numeric data 9 -none- numeric seed 626 -none- numeric statistic 1 -none- function sim 1 -none- character call 4 -none- call stype 1 -none- character strata 9 -none- numeric weights 9 -none- numeric
------------------------------------------------------------------- seems to imply that it's not actually assigned to an output variable...but it is shown when I just type "b.boot" Where is the std.error being assigned? and how to I access it? Thanks in advance... -Scott