[R] problem with boot

[Renaud Lancelot]

See the "statistics" argument in help file for boot. I guess what you
want is

Data <- rnorm(100)
foo <- function(d, i) mean(d[i])
boot(data = Data, statistic = foo, R = 500, stype = "i")

The second problem comes from a diseased distribution for the stat of
interest. It might be cured with an appropriate syntax for the boot
call.

Best,

Renaud

Juan Ramon Gonzalez wrote:
> 
> Hello R-users,
> 
> I'm using the boot's library. I have two questions:
> 
> 1. I execute for example
> 
>                     data<-rnorm(100)
>                     boot(data,mean,500)
> 
> and I obtain 500 equal bootstrap samples of data. Why?
> 
> 2. I need to calculate the bootstrap confidence intervals for a statistic,
> but when I use the function boot.ci it shows the error message:
> 
>        Error in if (!all(rk > 1 & rk < R)) warning("Extreme Order Statistics
> used as Endpoi...
> 
> What is happening?
> 
> Thank you,
> 
> Juan
> 
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-- 
Dr Renaud Lancelot, vétérinaire
CIRAD, Département Elevage et Médecine Vétérinaire (CIRAD-Emvt)
Programme Productions Animales
http://www.cirad.fr/presentation/programmes/prod-ani.shtml

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