In R, how to split/subset a data frame by factors in one column?

Split Data.frame by the value of a column

My data is like this (for example):

ID  Rate    State1   24 AL2 35 MN3 46 FL4 34 AL5 78 MN6 99 FL

I want to split the data by state and I want to get 3 data sets like below:

data set 1ID Rate State1 24 AL4 34 ALdata set 2ID Rate State2 35 MN5 78 MNdata set 3ID Rate State3 46 FL6 99 FL


Split(DF,DF$ State)
$AL
ID Rate State
1124AL
4434AL

$FL
ID Rate State
3 3  FL
6 6  FL

$MN
ID Rate State
2 2  MN
5 5  MN            


mylist <- split( df , df$State ) ; 
mylist[[1]]
MYLIST[[2]]
MYLIST[[3]]

REF:
Http://stackoverflow.com/questions/19327020/in-r-how-to-split-subset-a-data-frame-by-factors-in-one-column

In R, how to split/subset a data frame by factors in one column?