Hello, I would like to find all objects of a particular class. Is that possible to do so in R? I knew that in SPLUS, the function objects(class="classname") can do this. But in R, I cannot find the similar function to do so. Is there any way that I can distinguish where an object comes from? E.g. I defined a class "person". Then I generated three objects from it (e.g, Joe, Lee, Dan). I also have some other objects in the workspace (not from class "person"). How do I suppose to know in the current workspace I have exactly three objects (Joe, Lee, Dan) from the class "person"? For example, in the following program, at the final step when I run objects(), it will give me not only "Joe" ""Lee" and "Dan", but also "x". If I run some other programs before this, I might have other objects too. How can I let R only give me "Joe" ""Lee" and "Dan"?
Any help will be highly appreciated, Honglian setClass("person", representation(Name="character", PhoneNo="character", Address="character")) setMethod("show", "person", function(object) { x<- data.frame ([EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED]) print(x) } ) Joe = new("person", Name='Joe', PhoneNo='(210)481-5720', Address='San Antonio') Dan = new("person", Name='Dan', PhoneNo='(413)583-5202', Address='Boston') Lee = new("person", Name='Lee', PhoneNo='(519)837-1291', Address='Toronto') x <- objects() objects() _________________________________________________________________ Express yourself instantly with MSN Messenger! [1]MSN Messenger Download today it's FREE! References 1. http://g.msn.com/8HMAEN/2737??PS=47575 ______________________________________________ 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.