lines='Subject Before After
1 12.3 12.0
2 12.0 12.3
3 12.0 12.5
4 13.0 12.0
5 13.0 13.0
6 12.5 12.5
7 11.3 10.3
8 11.8 11.3
9 11.5 11.5
10 11.0 11.5
11 11.0 11.0
12 11.3 11.5'
con = textConnection( lines )
DF = read.table( con, header=TRUE )
close(con)
DF$Subject = NULL