[R] lapply / mapply and assignments

Magnus Torfason zulutime.net at gmail.com
Tue Oct 13 15:19:30 CEST 2009

Thank you so much, relist and SIMPLIFY both work.

See more comments below ...

On 10/12/2009 5:35 PM, Charles C. Berry wrote:
> On Mon, 12 Oct 2009, Magnus Torfason wrote:
>> I want to achieve the following:
>>>  l <- list( list(a=1,b=2), list(a=3,b=4))
>>>  l[[]]["a"] <- 5:6
> See
>     ?relist
> something like:
>     relist( unlist( mapply( "[<-", l, "a", 5:6) ), l )

Yes, this works exactly as needed. I had tried this, but I failed to 
notice that you could supply the skeleton argument separately. Thanks!

I had also tried

     mapply( "[<-", l, "a", c(5,6), SIMPLIFY=FALSE)

but failed to put SIMPLIFY in all-caps, and got an error message that I 
did not understand. It seems I was close on both methods, but not close 


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