R help - Oct 2005 - How to get the remaining vector after sampling a subset?

Hi ,
I have a vector,for example,
x=rnorm(100)
Then i rendom choose 20 of them.
chosen=sample(x,20).
And i want to get the remain values in x.
Is there a quick way to go?

Thanks in advance.

	[[alternative HTML version deleted]]

Xiao Shi wrote:
> Hi ,
> I have a vector,for example,
> x=rnorm(100)
> Then i rendom choose 20 of them.
> chosen=sample(x,20).
> And i want to get the remain values in x.
> Is there a quick way to go?
> 
> Thanks in advance.
> 
> 	[[alternative HTML version deleted]]
> 
How about:

x <- rnorm(100)
y <- sample(x, 20)
z <- x[!x %in% y]

But probably a safer way is to sample the indicies:

x <- rnorm(100)
w <- sample(length(x), 20)
y <- x[w]
z <- x[-w]

HTH,

--sundar

one way is to use:

x[!x %in% chosen]


I hope it helps.

Best,
Dimitris


----- Original Message ----- 
From: "Xiao Shi" <bioconductor.cn at gmail.com>
To: <r-help at stat.math.ethz.ch>
Sent: Sunday, October 09, 2005 11:26 AM
Subject: [R] How to get the remaining vector after sampling a subset?

> Hi ,
> I have a vector,for example,
> x=rnorm(100)
> Then i rendom choose 20 of them.
> chosen=sample(x,20).
> And i want to get the remain values in x.
> Is there a quick way to go?
>
> Thanks in advance.
>
> [[alternative HTML version deleted]]
>
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