I used merge() in a function, but it doesn't return correct data frame. 
   
  add.name <- function(data, x)
   
  {
   
  ...
  ...
   
  newfile <- merge(data, resid, by =0, all.x=TRUE, all.y= FALSE)
  newfile
   
   
  }
   
   

       
---------------------------------

	[[alternative HTML version deleted]]

