[R] Any container in R?

[Feng Qiu]

Hi Duncan:
         Thank you very much! I checked out unique(), it does exactly what I 
want. But I'm still curious about if R provides "STL"(standard template 
library).

Best,

Feng


----- Original Message ----- 
From: "Duncan Murdoch" <murdoch at stats.uwo.ca>
To: "Feng Qiu" <hustqiufeng at sohu.com>
Cc: <r-help at stat.math.ethz.ch>
Sent: Monday, January 01, 2007 12:36 PM
Subject: Re: [R] Any container in R?


> On 1/1/2007 11:22 AM, Feng Qiu wrote:
>> 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.
>
> You might want to use the unique() function, or duplicated(), rather than 
> doing this yourself.
>
> Duncan Murdoch
>
>>
>> Best,
>>
>> Feng
>>
>> ----- Original Message ----- 
>> From: "Duncan Murdoch" <murdoch at stats.uwo.ca>
>> To: "Feng Qiu" <hustqiufeng at sohu.com>
>> Cc: <r-help at stat.math.ethz.ch>
>> 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
>>>
>>>
>
>
>