Re: [R] Any container in R?

From: Feng Qiu <>
Date: Mon 01 Jan 2007 - 16:22:57 GMT

Hi Duncan:

         Thanks for your hints.
         I'm trying to collect distinct elements in one column in a matrix. 
If there is a map, I can easily build up such a collection. While if using list, I have to check by myself if this element already exists in the collection every time I examine a new entry in the column.



> On 1/1/2007 10:17 AM, Feng Qiu wrote:
>> R has list and array to contain elements. But does R have more powerful
>> container, such as "map" as in C++ STL? or is there such a package?
> In what way are maps more powerful than lists? You can use names to index
> lists.
> The other container in R is the environment; they have fairly strange
> semantics, though.
> Duncan Murdoch
> mailing list PLEASE do read the posting guide and provide commented, minimal, self-contained, reproducible code. Received on Tue Jan 02 03:27:32 2007

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.1.8, at Mon 01 Jan 2007 - 18:30:29 GMT.

Mailing list information is available at Please read the posting guide before posting to the list.