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.
Best,
Feng
----- Original Message -----
From: "Duncan Murdoch" <[EMAIL PROTECTED]>
To: "Feng Qiu" <[EMAIL PROTECTED]>
Cc: <[email protected]>
Sent: Monday, January 01, 2007 10:37 AM
Subject: Re: [R] Any container in R?
> 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
>
>
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