[R] bias of a boot statistic

[Prof Brian Ripley]

On Wed, 23 Feb 2005, K. Steinmann wrote:

> Question:
> How can I get access to the bias value of a boot statistic?
>
> Details:
> Boot function:
> boot(data, statistic, R, sim="ordinary", stype="i",
>           strata=rep(1,n), L=NULL, m=0, weights=NULL,
>           ran.gen=function(d, p) d, mle=NULL, ...)
>
> When I create an object, containing the bootstrap statistic (object <- boot
> (....))I can call it and will get an output with t, bias and standarderror as
> follows:
> Bootstrap Statistics :
>    original  bias    std. error
> t1*     5.65    0.01   0.9134185
>
> My question is now, where is the value of the bias stored? How can I get access
> to this value to do further caluculations?

apply(object, 2, mean, na.rm = TRUE) - boot.out$t0[1]

in your case.  I read that from

getS3method("print", "boot")


-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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