The answer of course is parse()! Thank you and good night! M
-----Original Message----- From: michael watson (IAH-C) Sent: 10 February 2005 13:36 To: [email protected] Subject: Using a number as a name to access a list Hi Dumb question time again, for which I apologise. I have a variable that contains the following numerical text "04010". This is the name to access a list: > as.list(KEGGPATHID2NAME)$"04010" [1] "MAPK signaling pathway" Marvellous! Except I want to do that when "04010" is assigned to a variable called path and I can't figure out how to do it! > path <- "04010" > > # the original and best > as.list(KEGGPATHID2NAME)$"04010" [1] "MAPK signaling pathway" > > # clearly this doesn't, and shouldn't, work > as.list(KEGGPATHID2NAME)$path NULL > > # this produces a string... > eval(paste("as.list(KEGGPATHID2NAME)$",path,sep='')) [1] "as.list(KEGGPATHID2NAME)$04010" > > # as does this > eval(paste('as.list(KEGGPATHID2NAME)$"',path,'"',sep='')) [1] "as.list(KEGGPATHID2NAME)$\"04010\"" > Whats really annoying is that when everyone mails me the answer, I'm going to have known how obvious it is.... Thanks in advance Mick Village Idiot ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
