add data from .RData file

HI Sarah, thanks for reply

your method works

what I did
load (" data.2005")
load ( "data.2006")
then
data.new<- c(  or we can save it as a new .RData also.

That looks failure prone. You have removed the context of your  
original question ( and PLEASE stop doing that despite the fact that  
the Nabble interface leads to to think that the rest of us see  
it) .... but I seem to remember that you had the same number of  
columns, so:

data.new <- cbind ( data.2005, data.2006 )
save(data.new, file="data.new.RData")

The NULL files I can remove by selecting particular file number
e.g data.new<- c( data.2005[1:3], data.2006[4:6])

David Winsemius, MD
West Hartford, CT