[R] list: index of the element, that is TRUE

[David Winsemius]

On Jan 16, 2012, at 10:34 AM, Marion Wenty wrote:

> Dear People,
>
> I have got the following example for a vector and the index of the  
> TRUE
> element:
>
> Myvector <- c(FALSE,FALSE,FALSE,FALSE,FALSE,FALSE,FALSE,TRUE)
> which(Myvector)
>
> Now I would like to find out the same for a list:
>
> Mylist <- list(FALSE,FALSE,FALSE,FALSE,FALSE,FALSE,FALSE,TRUE)

which(unlist(Mylist))

>
> ...
>
> Does anyone know how to do this?
>
> Thank you very much in advance,
> Marion
>
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>
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David Winsemius, MD
West Hartford, CT