[R] dynamic object names?

[Uwe Ligges]

John Charles Considine wrote:

> On Mon, 2005-09-19 at 11:38 +0200, Uwe Ligges wrote:
> 
>>samir at guidi.ch wrote:
>>
>>
>>>I am trying to extract data from a matrix. Let's say that i am interested in
>>>extracting 
>>>rows from a 4x4 matrix. Instead of giving a fix name to these 4 rows I would
>>>like to add a number to prefix. As result I should get 4 objects named: 
>>>
>>>prefix_1 
>>>prefix_2 
>>>prefix_3
>>>prefix_4
> 
> Samir,
> In addition to the other comments, part of the problem may be that you
> can't assign the character '_' to standard objects.


Why not???
R can handle standard names with "_" in it for ages now.

Uwe Ligges



 > Could you use '.' instead?
> JC 
> 
> 
>>>I attepted to solve the problem with a loop, but without success. Any hints??
>>
>>
>>1. In fact, you do not really want it.
>>2. You want to use "<-" rather than "->" for assigments. Reading your 
>>code is really hard when you are using this non-conventional way.
>>3. In order to answer your question: This is the FAQ "How can I turn a 
>>string into a variable?". The posting guide asks you to read these FAQs 
>>before sending questions to R-help. Please do so.
>>
>>Uwe Ligges
>>
>>
>>
>>
>>
>>>>matrix(LETTERS[1:16], ncol=4) -> MM
>>>>MM
>>>
>>>     [,1] [,2] [,3] [,4]
>>>[1,] "A"  "E"  "I"  "M" 
>>>[2,] "B"  "F"  "J"  "N" 
>>>[3,] "C"  "G"  "K"  "O" 
>>>[4,] "D"  "H"  "L"  "P" 
>>>
>>>
>>>for (xxx in 1:4) {
>>>MM[xxx,] -> prefix_xxx;
>>>}
>>>
>>>
>>>Thanks
>>>
>>>samir
>>>
>>>______________________________________________
>>>R-help at stat.math.ethz.ch mailing list
>>>https://stat.ethz.ch/mailman/listinfo/r-help
>>>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
>>
>>______________________________________________
>>R-help at stat.math.ethz.ch mailing list
>>https://stat.ethz.ch/mailman/listinfo/r-help
>>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
> 
> 
> ______________________________________________
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