Re: [R] how to eliminate an element of a list
On Aug 13, 2010, at 4:06 PM, fishkbob wrote: list<-seq(2,10,2) list [1] 2 4 6 8 10 list[-which(2==list)] [1] 4 6 8 10 using the which() will let you remove things from a list that have a specified value... I usually use the blah<- blah[-which(TRUE==is.na(blah)) ] which will remove all NA values in your list Although which() is useful when used with "[" because it avoids the NA indexing problem, it is entirely superfluous here. blah<- blah[-is.na(blah) ] # will be more efficient -- David Winsemius, MD West Hartford, CT __ R-help@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.
Re: [R] how to eliminate an element of a list
Try to do this > list <- seq(1,5,1) > list<-list[-3] > list [1] 1 2 4 5 list[-x] will remove the xth value in your list. Also you can do something like > list[-c(1:4)] [1] 5 To remove values at indexes 1-4 > list[-c(1,4)] [1] 2 3 5 To remove values at indexes 1 and 4 -- View this message in context: http://r.789695.n4.nabble.com/how-to-eliminate-an-element-of-a-list-tp2323329p2324691.html Sent from the R help mailing list archive at Nabble.com. __ R-help@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.
Re: [R] how to eliminate an element of a list
> list<-seq(2,10,2) > list [1] 2 4 6 8 10 > list[-which(2==list)] [1] 4 6 8 10 using the which() will let you remove things from a list that have a specified value... I usually use the blah<- blah[-which(TRUE==is.na(blah)) ] which will remove all NA values in your list -- View this message in context: http://r.789695.n4.nabble.com/how-to-eliminate-an-element-of-a-list-tp2323329p2324696.html Sent from the R help mailing list archive at Nabble.com. __ R-help@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.
Re: [R] how to eliminate an element of a list
Hello André,
> I want to eliminate an element of a list:
>
> list <- seq(1,5,1)
That's not a list, it's a vector
> s <- sample(list,1)
>
> lets say s=3
> Now I want to remove 3 from the list: list2 = {1,2,4,5}
If all values are unique as in your example, this will work
x <- 1:5
s <- sample(x, 1)
x <- x[ x != s ]
The last step could also be...
x <- x[ -match(s, x) ] # note minus sign
Lots of other was to do it too.
Note, I'm assuming you won't always have values equal to the element indices.
Michael
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Re: [R] how to eliminate an element of a list
Try this:
setdiff(list, s)
On Thu, Aug 12, 2010 at 5:32 PM, André de Boer wrote:
> Hi,
>
> I want to eliminate an element of a list:
>
> list <- seq(1,5,1)
> s <- sample(list,1)
>
> lets say s=3
> Now I want to remove 3 from the list: list2 = {1,2,4,5}
>
> Can someone give me a tip?
>
> Thanks,
> André
>
>[[alternative HTML version deleted]]
>
>
> __
> R-help@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.
>
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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[R] how to eliminate an element of a list
Hi,
I want to eliminate an element of a list:
list <- seq(1,5,1)
s <- sample(list,1)
lets say s=3
Now I want to remove 3 from the list: list2 = {1,2,4,5}
Can someone give me a tip?
Thanks,
André
[[alternative HTML version deleted]]
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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.
