[R] Compare each element of a list to a vector

[jim holtman]

try this:

> x<-c(1,2,3)
> datalist<-list(c(1,2,3),c(2,3,4),c(3,4,5),c(4,5,6))
>
> result <- sapply(datalist, function(.vec){
+     all(.vec == x)
+ })
>
> result
[1]  TRUE FALSE FALSE FALSE
>


On Sun, Feb 3, 2013 at 1:15 PM,  <mtb954 at gmail.com> wrote:
> Hello R-helpers,
>
> I have a vector
>
> x<-c(1,2,3)
>
> and a list that contains vectors
>
> datalist<-list(c(1,2,3),c(2,3,4),c(3,4,5),c(4,5,6))
>
> and I would like to identify those list elements that are identical to x.
>
> I tried
>
>> datalist %in% x
> [1] FALSE FALSE FALSE FALSE
>
> but I am obviously using %in% incorrectly. I also tried messing around with
> lapply but I can't figure out how to specify the function within lapply.
>
> I would appreciate any suggestions you may have.
>
> Many thanks!
>
> Mark Na
>
>         [[alternative HTML version deleted]]
>
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-- 
Jim Holtman
Data Munger Guru

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