[R] Data Manipulation

Peter Rote r.rote12 at googlemail.com
Tue Jan 26 11:15:01 CET 2010


I still struggling with this:

 error massage:

>  by(AlexETF,AlexETF$Industry,function(a) {filename = paste("C:/ab/",gsub("
> ","",a$Industry[1]),".txt",sep="")
+         print(filename)
+ write.table(a[,3,drop=FALSE],quote=FALSE,col.names=FALSE,row.names=FALSE)    
+     }
+  )  

[1] "C:/ab/Accident&HealthInsurance.txt"
Error in `[.data.frame`(a, , 3, drop = FALSE) :
  undefined columns selected

Best,
Peter 
-- 
View this message in context: http://n4.nabble.com/Data-Manipulation-tp1018249p1290191.html
Sent from the R help mailing list archive at Nabble.com.



More information about the R-help mailing list