[R] Bootstrapping in R

[Christoph Puschmann]

Dear Bryan,

Did you try to include formula in the boot command? like: 

results <- boot(data, statistic, R, formula) 

All the best,

Christoph

> On 1 Oct 2016, at 19:24, Michael Dewey <lists at dewey.myzen.co.uk> wrote:
> 
> Dear Bryan
> 
> You are not resetting the seed each time by any chance?
> 
> Michael
> 
> On 01/10/2016 02:44, Bryan Mac wrote:
>> Hi,
>> 
>> I have read the help page and it was helpful but, I am having concerns because each time I run this code I get the same value.
>> I expected that each time I run the code, I will get different values due to random sampling.
>> 
>> How do I get this randomization? The values shouldn’t be the same each time the code is run, correct?
>> 
>> 
>> result <- boot(n_data, statistic = DataSummary, R = 100).
>> 
>> 
>> Best,
>> 
>> Bryan Mac
>> bryanmac.24 at gmail.com
>> 
>> 
>> 
>>> On Sep 29, 2016, at 12:16 PM, ruipbarradas at sapo.pt wrote:
>>> 
>>> Hello,
>>> 
>>> Read the help page ?boot::boot.
>>> For instance, try the following.
>>> 
>>> 
>>> library(boot)
>>> 
>>> x <- rnorm(100)
>>> stat <- function(x, f) mean(x[f])
>>> boot(x, stat, R = 100)
>>> 
>>> Hope this helps,
>>> 
>>> Rui Barradas
>>> 
>>> 
>>> 
>>> Citando bryan.mac24 <bryan.mac24 at gmail.com>:
>>> 
>>>> Hi all,
>>>> I am wondering how to conduct bootstrapping in R. I need bootstrap 100 times. The trick I need to figure out is how to do get a random sample of 100 out of the total number of case.
>>>> Best,
>>>> BM
>>>> 	[[alternative HTML version deleted]]
>>>> 
>>>> ______________________________________________
>>>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>>>> and provide commented, minimal, self-contained, reproducible code.
>>> 
>>> 
>>> 
>> 
>> 
>> 	[[alternative HTML version deleted]]
>> 
>> ______________________________________________
>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>> 
> 
> -- 
> Michael
> http://www.dewey.myzen.co.uk/home.html
> 
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.