
Good morning,
 
I am trying to recode the values of a column in a data frame and,
instead of using a long series of if/else statements I would like to use
a switch (as it is, for instance, in the C programming language).
 
I have a column of this type:
 
AT
BB
B1
B1
CC
CC
T6
B1
CC
BB
TT
AT
AT
AT
TT
BB
 ...
 
and I need to change this coding (if it's AT then it should be A1, if
it's BB then it should be A2, and so on ...)
 
I was trying to use switch in the following way:
 
switch(column_name,
'AT'='A1'
'BB'='A2'
...)
 
but it's not working.
The R help is particularly cryptic on this point.
 
Can anyone help me?
 
Thank you very much,
 
Filippo Biscarini
 
University of Wageningen (The Netherlands) 

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