[R] Assigning entries to category
Charles C. Berry
cberry at tajo.ucsd.edu
Wed Jun 30 18:27:58 CEST 2010
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 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.
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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
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