[R] Length problem

From: Paolo Grillo <paolo.grillo_at_guest.unimi.it>
Date: Mon, 11 Feb 2008 16:25:42 +0100

   Hi all
   I have this problem:
   In my database .dta, called "data" I have five rows    data<-read.dta("C:\\2_CO_mmobile_ALL_Rid.dta")
# From this database I wuold like to create another
   coppie<-c(data[4:length(data)])
   but I find this

# Length of original data

   length(data[,4])

   5                       RIGHT!!

# Length of new data

   length(coppie[1])
   1                      WHY??

   Thank you all for your help
   Paolo Grillo

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