Re: [Rd] setClass with a slot of RODBC

From: Uwe Ligges <ligges_at_statistik.uni-dortmund.de>
Date: Tue, 05 Jun 2007 09:20:12 +0200

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
>
> [[alternative HTML version deleted]]
>
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