sample

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Yes and no. Same effect, but you won't get the same random numbers
because -- I believe -- a different algorithm is used. grep the source
for sample and sample2 if you're interested.

Cheers,
Michael
Hello
If I have x=c(3,2,6,1) and n=length(x), are the following codes equivalent??
sample(x,1,replace=TRUE)    and       sample(x,1,replace=TRUE,prob=rep(1/n , n) )
Regards
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Hi,
They get different results:
with the same set.seed()
?x=c(3,2,6,1) 
?n=length(x)
?set.seed(1)
?sample(x,1,replace=TRUE)? 
#[1] 2
set.seed(1)
?sample(x,1,replace=TRUE,prob=rep(1/n , n) )
#[1] 6

?identical(sample(x,1,replace=TRUE),sample(x,1,replace=TRUE,prob=rep(1/n , n) ))
#[1] FALSE
A.K.

----- Original Message -----
From: solafah bh <solafahbh at yahoo.com>
To: R help mailing list <r-help at r-project.org>
Cc: 
Sent: Saturday, October 6, 2012 12:02 PM
Subject: [R] sample

Hello
If I have x=c(3,2,6,1) and n=length(x), are the following codes equivalent??
sample(x,1,replace=TRUE)??? and?????? sample(x,1,replace=TRUE,prob=rep(1/n , n) )
Regards
??? [[alternative HTML version deleted]]

______________________________________________
R-help at r-project.org mailing list
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.