On Sep 10, 2013, at 22:56 , Rolf Turner wrote: > On 09/11/13 07:54, Davis, Brian wrote: >> I'm sure this has been answered before but alas my googlefoo is not that >> strong. >> >> I have several .Rdata files with a single object in them. I need to set the >> class of the object to "myClass". Unfortunately, I don't know the name of >> the object beforehand. Obviously I could ls() and get the name but as I >> have quite a few of these I'd like to do it programmatically. >> >> >> I thought something like this would work, but I get an error. >> >>> obj_name <- load("Robject.RData") # get the name of the loaded object >>> class(get(obj_name)) <- "myClass" >> Error in class(get(obj_name)) <- " myClass " : >> could not find function "get<-" >> >> >> So I guess the question is how do I set the class of an R object when I only >> have the object name as a character string? > > (a) Actually, a wee experiment that I did indicates that your strategy > actually *works* despite the error message!!! > That is, you wind up with an object, named by obj_name, with class "myClass". > I don't understand this. Perhaps > someone more knowledgeable than I will enlighten us both.
It certainly won't work universally: > x <- 5 > obj_name <- "x" > class(get(obj_name))<-"foo" Error in class(get(obj_name)) <- "foo" : could not find function "get<-" > x [1] 5 so further details of your wee experiments need to be revealed. -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd....@cbs.dk Priv: pda...@gmail.com ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.