 
Hi - I tried to get some answer before but there seems to have no one response. My question is that I have a class like below definition:
 
setClass("DBManager", 
   representation(channel="RODBC"))
 
My purpose of the conn slot is to hold a channel to database connection which is returned by a command like:
 
channel <- odbcConnect("DB", uid="user", pwd="password")
 
According to RODBC documentation, this channel is supposed to have a type of "RODBC". However, if I declare my class as above, R will complain that it does not know about "RODBC" type or class. Please clarify. Thank you.
 
- adschai 

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