Hi,
   
  How can I achieve this in R. Dataset is as follows:
   
  >df
    x
1 2
2 4
3 1
4 3
5 3
6 2

  structure(list(x = c(2, 4, 1, 3, 3, 2)), .Names = "x", row.names = c("1", 
"2", "3", "4", "5", "6"), class = "data.frame")

  I want to recreate a new data frame whose rows are sum of (1&2, 3&4, 5&6) of original df. For example
   
  >newdf
     x 
  1 6
  2 4
  3 5
   
  Thanx in advance for the help.
   
  Sachin
   

 		
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