Re: [R] How can I obtain the values of BIAS and STD. ERROR from a bootstrap.

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Mon 10 Jul 2006 - 23:31:42 EST

Look at the code of boot:::print.boot , which does the calculations.

On Mon, 10 Jul 2006, John Sorkin wrote:

> R 2.3.1
> Windows XP
>
> Question: How can I obtain the values of BIAS and STD. ERROR from a
> bootstrap.
>
> Background:
> I am running a bootstrap:
> result2<-boot(1:400,regSEvssample,R=5000)
>
> and obtain the following results:
>
> Bootstrap Statistics :
> original bias std. error
> t1* 1.876602 -0.0001368616 0.1630380
>
> I would like to get the values of ORIGINAL and BIAS. I can get the
> value of ORIGINAL:
>
>> result2$t0
> [1] 1.876602
>
> But I can't find a way to get the values of BIAS or STD. ERROR. Can
> someone suggest how I can obtain the values for these two statistics?
>
> Thanks,
> John
>
> John Sorkin M.D., Ph.D.
> Chief, Biostatistics and Informatics
> Baltimore VA Medical Center GRECC,
> University of Maryland School of Medicine Claude D. Pepper OAIC,
> University of Maryland Clinical Nutrition Research Unit, and
> Baltimore VA Center Stroke of Excellence
>
> University of Maryland School of Medicine
> Division of Gerontology
> Baltimore VA Medical Center
> 10 North Greene Street
> GRECC (BT/18/GR)
> Baltimore, MD 21201-1524
>
> 410-605-7119
> jsorkin@grecc.umaryland.edu
>
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-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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Received on Mon Jul 10 23:36:10 2006

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