[R] Selecting from a Dataframe

[Berton Gunter]

?"%in%"

as in

chosenCounties<-subset(DailyCounty, DailyCounty$County%in%
c("Appling","county2Name","county3Name"))



-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
 
"The business of the statistician is to catalyze the scientific learning
process."  - George E. P. Box
 
 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Dan Chan
> Sent: Tuesday, April 04, 2006 10:42 AM
> To: r-help at stat.math.ethz.ch
> Subject: [R] Selecting from a Dataframe
> 
> Hi,
> 
> I have a data frame with many fields and there are many records. 
> One of the fields is county names in Georgia. 
> I want to select all the records for 3 of the counties. 
> How can I do that? 
> 
> DailyCounty is the dataframe that holds the data.  One of the 
> fields is
> County.  The following statement will extract all records for Appling
> County and store as Appling.  
> 
> Appling <- subset(DailyCounty, DailyCounty$County== ("Appling"))
> 
> I suppose I can do the same for the other two counties, but how can I
> combine them into one single data frame?  Each county has a different
> numbers of records in the dataframe DailyCounty. 
> 
> Thank you. 
> 
> Daniel Chan
> Meteorologist
> Georgia Forestry Commission
> P O Box 819
> Macon, GA 
> 31202
> Tel: 478-751-3508
> Fax: 478-751-3465
> 
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