On Tue, Aug 19, 2014 at 1:30 AM, Jinsong Zhao <jsz...@yeah.net> wrote: > Hi there, > > I have several saved data files (e.g., A.RData, B.RData and C.RData). In > each file, there are some objects with same names but different > contents. Now, I need to compare those objects through plotting. > However, I can't find a way to load them into a workspace. The only > thing I can do is to rename them and then save and load again. > > Is there a convenient to load those objects? > > Thanks a lot in advance.
The technique of loading into an environment already mentioned can be cleaned up and put into a function. First lets save a thing called "x" into two files with different values: > x="first" > save(x,file="f.RData") > x="second" > save(x,file="s.RData") This little function wraps the loading: > getFrom=function(file, name){e=new.env();load(file,env=e);e[[name]]} So now I can get 'x' from the first file - the value is returned from `getFrom` so I can assign it to anything: > x1 = getFrom("f.RData","x") > x1 [1] "first" > x2 = getFrom("s.RData","x") > x2 [1] "second" And I can even loop over RData files and read in all the `x`s into a vector: > sapply(c("f.RData","s.RData"),function(f){getFrom(f,"x")}) f.RData s.RData "first" "second" (on second thoughts, possibly 'loadFrom' is a better name) Barry ______________________________________________ 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.