[R] Classification

[Ing. Michal Kneifl, Ph.D.]

Hi,
I am also a quite new user of R and would like to ask you for help:
I have a data frame where all columns are numeric variables. My aim is  
to convert one columnt in factors.
Example:
MD
0.2
0.1
0.8
0.3
0.7
0.6
0.01
0.2
0.5
1
1


I want to make classes:
0-0.2 A
0.21-0.4 B
0.41-0.6 C
..... and so on

So after classification I wil get:
MD
A
A
D
B
.
.
.
and so on

Please could you give an advice to a newbie?
Thanks a lot in advance..

Michael