R help - Mar 2013 - boot with different sample sizes

Dear all,
a question about the package boot: is it possible to bootstrap a 
function of arguments of different length? is there an alternative package?
below an example of a simple try,

many thanks
paolo
> library(boot)
> blue<-c(4, 3, 4, 1, 2, 3, 1)
> red<-c(4, 3, 4, 1, 2, 3, 1, 2, 3, 1, 3, 2)
>
> test1<-function(x,y,d){
+ 	return(sum(x) - sum(y))
+ 	}
> b=boot(red blue, test1 ,R=10)
Error: unexpected symbol in "b=boot(red blue"



-- 
Paolo Brunori
Ricercatore in Economia Politica
Dipartimento di Scienze Economiche
Via C. Rosalba 53, 70124 Bari
tel +39 080 504 90 51
fax +39 080 504 9149

Hello,

The second argument to your function must be a "vector of indices",
like
the manual page for ?boot says.
And you were missing a comma. That's what the error message was saying.



library(boot)
blue<-c(4, 3, 4, 1, 2, 3, 1)
red<-c(4, 3, 4, 1, 2, 3, 1, 2, 3, 1, 3, 2)

test1<-function(x, d, y){
      return(sum(x[d]) - sum(y))
}
b <- boot(red, test1, R=10, y = blue)
b
sum(red) - sum(blue)


Hope this helps,

Rui Barradas

Em 20-03-2013 22:49, paolo brunori escreveu:
> Dear all,
> a question about the package boot: is it possible to bootstrap a
> function of arguments of different length? is there an alternative package?
> below an example of a simple try,
>
> many thanks
> paolo
>
>> library(boot)
>> blue<-c(4, 3, 4, 1, 2, 3, 1)
>> red<-c(4, 3, 4, 1, 2, 3, 1, 2, 3, 1, 3, 2)
>>
>> test1<-function(x,y,d){
> +     return(sum(x) - sum(y))
> +     }
>> b=boot(red blue, test1 ,R=10)
> Error: unexpected symbol in "b=boot(red blue"
>
>
>