[Rd] setClass with a slot of RODBC

[Uwe Ligges]

adschai at optonline.net wrote:
>  
> 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:

Don't forget that "RODBC" is not an S4 but an S3 class, hence you have 
to declare it:

setOldClass("RODBC")


Uwe Ligges


> 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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> 
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