[R] Assigning entries to category

[David Winsemius]

On Jun 30, 2010, at 12:27 PM, Charles C. Berry wrote:

>
>
> see
>
> 	?cut
> 	?interaction
>

I had been thinking that findInterval or expand.grid might also be  
useful, but was really waiting for a test data preparation to emerge.

-- 
David.
> HTH,
>
> Chuck
>
> On Wed, 30 Jun 2010, LogLord wrote:
>
>>
>> Hi,
>>
>> I have the following problem:
>> I have a large dataframe where each row is specified by two  
>> numerical value
>> (one 1:25 and the other one large specific number (e.g. 203043)). I  
>> have a
>> list of 60 categories which are also assigned to one of the first  
>> numerical
>> value (1:25) but have a range for the second numerical value  (e.g.  
>> 200020 -
>> 208040) in two different columns.
>>
>> I want now to assign a category to each row in a new variable by  
>> testing for
>> accordance to the first numerical value and overlap of the second  
>> numerical
>> value with the range.
>>
>> For example:
>> entry1 has numerical value 1 = 15 and numerical value 2 = 200050.
>> This would be assigned to category3, which has a numerical value 1  
>> = 15 and
>> a range for numerical value 2 = 200000 - 201000.
>>
>> It would be great if any one could help me out with this.
>>
>> Thanks!
>> -- 
>> View this message in context: http://r.789695.n4.nabble.com/Assigning-entries-to-category-tp2272707p2272707.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
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>> and provide commented, minimal, self-contained, reproducible code.
>>
>
> Charles C. Berry                            (858) 534-2098
>                                            Dept of Family/Preventive  
> Medicine
> E mailto:cberry at tajo.ucsd.edu	            UC San Diego
> http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego  
> 92093-0901
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

David Winsemius, MD
West Hartford, CT