[R] Extracting subset of a vector

[jim holtman]

Work with the indices.

> x<-c(100,96,88,100,100,96,80,68,92,96,88,92,68,84,84,88,72,88,72,88)
> x1 <- sample(length(x), 5, replace=FALSE)
> x1
[1] 18 20 12 11  1
> length(x.new)> x[x1] # selected
[1]  88  88  92  88 100

> x.new <- x[-x1]  # remove sampled values
> x.new
 [1]  96  88 100 100  96  80  68  92  96  68  84  84  88  72  72
> length(x)
[1] 20
> length(x1)
[1] 5
> length(x.new)
[1] 15
>


On Sat, Oct 11, 2008 at 3:46 PM, Megh Dal <megh700004 at yahoo.com> wrote:
> Thanks for this suggestion. However I am not getting :
>
> length(x) = length(x1) + length(x[ ! x %in% x1])
>
> Any better idea?
>
>
> --- On Sun, 10/12/08, Jorge Ivan Velez <jorgeivanvelez at gmail.com> wrote:
>
>> From: Jorge Ivan Velez <jorgeivanvelez at gmail.com>
>> Subject: Re: [R] Extracting subset of a vector
>> To: megh700004 at yahoo.com
>> Cc: r-help at stat.math.ethz.ch
>> Date: Sunday, October 12, 2008, 1:06 AM
>> Hi Megh,
>> Try this:
>>
>> x<-c(100,96,88,100,100,96,80,68,92,96,88,92,68,84,84,88,72,88,72,88)
>> x1 = sample(x, 5, replace=FALSE)
>>
>> x[ ! x %in% x1]
>>
>> HTH,
>>
>> Jorge
>>
>>
>> On Sat, Oct 11, 2008 at 3:25 PM, Megh Dal
>> <megh700004 at yahoo.com> wrote:
>>
>> > I have 2 vecros :
>> >
>> x<-c(100,96,88,100,100,96,80,68,92,96,88,92,68,84,84,88,72,88,72,88)
>> > x1 = sample(x, 5, replace=FALSE)
>> >
>> > Now i want to get remaining values of vector
>> "x" those are not member of
>> > vector "x1". Can anyone please tell me how
>> to do that?
>> >
>> > ______________________________________________
>> > 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.
>> >
>
> ______________________________________________
> 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.
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?