R help - Sep 2003 - A re-sampling problem

I plan on analyzing some bird point count data. I need to develop a 
re-sampling regime for data like this.

I used
scan(file="Sample.txt",what=list(0,0,0,0,0,0),sep="\t")

[[1]]
[1] 1 2 3 4 5

[[2]]
[1]  6  7  8  9 NA

[[3]]
[1] 10 11 12 13 NA

[[4]]
[1] 14 15 16 NA NA

[[5]]
[1] 17 18 19 20 21

Each row represents one site and the numbers (1-21) are visits to that site. 
I'm going to be figuring out how many visits to each site is optimal so I 
will need to compare 1 visit to 2 visits to 3 visits etc. Therefore I need 
to somehow sample 1,2,3,4,or 5 visits with replacement from a random (with 
replacement) row 1000 times. Any ideas? I'm relatively familiar with the 
sample() functoin but not sure how to make it do this. I'm open to importing
the data in a different way if that would make it easier. Thanks,

Nathan

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Have you looked at the discussion of bootstrapping in, e.g., Venables 
and Ripley (2002) Modern Applied Statistics with S, 4th ed. (Springer)? 

hope this helps.  spencer graves

Nathan Cooper wrote:
> I plan on analyzing some bird point count data. I need to develop a 
> re-sampling regime for data like this.
>
> I used
scan(file="Sample.txt",what=list(0,0,0,0,0,0),sep="\t")
>
> [[1]]
> [1] 1 2 3 4 5
>
> [[2]]
> [1]  6  7  8  9 NA
>
> [[3]]
> [1] 10 11 12 13 NA
>
> [[4]]
> [1] 14 15 16 NA NA
>
> [[5]]
> [1] 17 18 19 20 21
>
> Each row represents one site and the numbers (1-21) are visits to that 
> site. I'm going to be figuring out how many visits to each site is 
> optimal so I will need to compare 1 visit to 2 visits to 3 visits etc. 
> Therefore I need to somehow sample 1,2,3,4,or 5 visits with 
> replacement from a random (with replacement) row 1000 times. Any 
> ideas? I'm relatively familiar with the sample() functoin but not sure 
> how to make it do this. I'm open to importing the data in a different 
> way if that would make it easier. Thanks,
>
> Nathan
>
> _________________________________________________________________
> Share your photos without swamping your Inbox.  Get Hotmail Extra 
> Storage today! http://join.msn.com/?PAGE=features/es
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