Dear Omar, The following function tests whether a package is in the search path (with the package name given in quotes):
packageLoaded <- function(name) 0 != length(grep(paste("^package:", name, "$", sep=""), search())) I hope this helps, John -------------------------------- John Fox Department of Sociology McMaster University Hamilton, Ontario Canada L8S 4M4 905-525-9140x23604 http://socserv.mcmaster.ca/jfox -------------------------------- > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Omar Lakkis > Sent: Tuesday, September 13, 2005 2:09 PM > To: r-help@stat.math.ethz.ch > Subject: [R] is library loaded > > Is there a way to test if a library has been loaded? > > is.loaded does not give me what I want, I am looking to say: > > if loaded(Rdbi) dbSendQuery(conn, q) > if loaded(RODBC) sqlQuery(conn, q) > > I need this to support both unix and windows platforms as I > could not find a windows distribution for RdbiPgSQL. I am > using R 2.1.0 and postgresql. I will be connecting to the > database using Rdbi and RdbiPgSQL and have other developers > using windows connect with RODBC, unless someone can suggest > a better solution. > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html