Question

Given data frame values are

     Group          year       Value
     A              2010       17
     A              2011       18
     F              2010        8
     F              2011        9

i want to convert it into

          Year      A      F  
          2010     17      8
          2011     18      9

is there any simple solution to solve this

Answer 1

library('reshape2')

df <- read.table(text="     Group          year       Value
     A              2010       17
     A              2011       18
     F              2010        8
     F              2011        9", header = TRUE)

dfc <- dcast(df, year ~ Group )