[R] Data Frame to list?

[Brian Diggs]

On 3/7/2014 7:41 PM, Keith S Weintraub wrote:
> Folks,
>
> I have a data frame as follows:
>
>> foo<-structure(list(name = c("A", "B", "C"), num = c(3L, 2L, 1L)), .Names = c("name",
> "num"), row.names = c(NA, -3L), class = "data.frame")
>
>> str(foo)
> 'data.frame':   3 obs. of  2 variables:
>   $ name: chr  "A" "B" "C"
>   $ num : int  3 2 1
>
>> foo
>    name num
> 1    A   3
> 2    B   2
> 3    C   1
>
> I want to convert this to a list like so:
>
>> oof<-list(A = 3, B = 2, C = 1)

You can do it as a one-liner as well:

oof <- setNames(as.list(foo$num), foo$name)

>> str(oof)
> List of 3
>   $ A: num 3
>   $ B: num 2
>   $ C: num 1
>
>> oof
> $A
> [1] 3
>
> $B
> [1] 2
>
> $C
> [1] 1
>
> Any Suggestions?
>
> Thanks,
> KW
>
> --
>


-- 
Brian S. Diggs, PhD
Senior Research Associate, Department of Surgery
Oregon Health & Science University