adschai at optonline.net
2007-May-29 03:01 UTC
[R] How to assign RODBC object as R class slots and method signature? [Please respond!]
HiI have a class which would like to hold
a connection to ODBC data connection. The handle to the connection is
something like (according to RODBC manual):channel
odbcConnect("DSN",uid="user",pwd="password")However,
I would like to
make a slot of my "foo" class to hold this object. For
example:setClass("foo", representation(channel="RODBC"))But
this won't
compile as it keeps saying that it cannot find "RODBC" as a valid
class
name even I have the package loaded in place. And from what I found in
RODBC manual, the 'channel' variable should be of type 'RODBC'.
This
makes it even more difficult when I try define this database connection
like 'channel' above as method signature.For example, I have a class
for method like this.setMethod("setConn", "foo",
signature(object="foo",newconn="RODBC") function(object,
newconn) {
... do something here. })This doesn't compile. It will keep saying
that it doesn't know about type "RODBC". Please let me know how we
can
solve this? Thank you.- adschai
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