Hello sir:
If there's a data frame(with name "df"):
a b c d e f
1 10 12 20 30 100
2 3 15 16 40 200
..
If I wanna change the last 3 colunm names"d" "e" "f" respectively into "x" "y"
"z"respectively,the following is what I do:
colnames(df[4:6])<-c("x","y","z")
But no change to the colnames of df.
And if I wanna change all the colnames:
colnames(df)<-letters[1:6]
All the colnames have been changed.
So I wanna know the reason,and how to change the last 3 colnames of df.
Thanks a lot!
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