[R] Assigning entries to category
dwinsemius at comcast.net
Wed Jun 30 18:53:45 CEST 2010
On Jun 30, 2010, at 12:27 PM, Charles C. Berry wrote:
I had been thinking that findInterval or expand.grid might also be
useful, but was really waiting for a test data preparation to emerge.
> On Wed, 30 Jun 2010, LogLord wrote:
>> 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
>> 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
>> 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.
>> View this message in context: http://r.789695.n4.nabble.com/Assigning-entries-to-category-tp2272707p2272707.html
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>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
> Charles C. Berry (858) 534-2098
> Dept of Family/Preventive
> E mailto:cberry at tajo.ucsd.edu UC San Diego
> http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego
> R-help at r-project.org mailing list
> 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
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