I got it to work.  I didn't have the data listed as a vector (c in front of
the data).  I copied Peter's code and it worked perfectly.  Thanks!   

 

Mike  

 

From: Jonathan Christensen [mailto:dzhonatan@gmail.com] 
Sent: Tuesday, September 28, 2010 9:31 PM
To: Michael Larkin
Cc: r-help@r-project.org
Subject: Re: [R] need help with ramdomly sampling some data

 

Mike,

It works for me:

> data <- 1:8
> sample(data,replace=TRUE)
[1] 6 4 5 2 5 8 7 2

Please provide a reproducible example, if possible, and the output of
sessionInfo().

Jonathan



On Tue, Sep 28, 2010 at 7:22 PM, Michael Larkin <mlarkin@rsmas.miami.edu>
wrote:

I am trying to get R to randomly select values from my dataset (i.e.
bootstrapping) with replacement.  However, my attempts at this have been
unsuccessful.  Here is a basic example of what I am doing:

I have a data vector of 8 values (i.e. data= 2,5,9,4,5,6,7,8).  I used the
sample function and it worked.  However, it only repeated my values in the
exact same order as the dataset.  It did not randomly sample them.  Here the
code for what I did:

sample(data, replace=TRUE)

Any advice to randomly select data from my dataset would be greatly
appreciated.

Mike




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