[R] create list entry from variable

[William Dunlap]

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of rami jiossy
> Sent: Monday, August 24, 2009 12:01 PM
> To: R-Help
> Subject: [R] create list entry from variable
> 
> 
> Hi;
> 
> assume i<-10
> 
> how can  i create a list having key=10 and value=11
> 
> list(i=11) generates a list with 
> 
> 'i'
> [1] 11
> 
> and not 
> 
> 10
> [1] 11
> 
> any help?

You can use [[<- with a character argument for the key
   > myList<-list()
   > i<-"10"
   > myList[[i]] <- 11
   > myList
   $`10`
   [1] 11
If you use an integer argument, as in,
    myList[[10]] <- 11
then 11 becomes the 10'th element of myList, not the
element named '10'.

myList[[i]] <- NULL
will remove the element.

Bill Dunlap
TIBCO Software Inc - Spotfire Division
wdunlap tibco.com 

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