What you need to ensure is that you have sufficient physical memory for the operations that you want to do. I would suggest at least 3X the size of the object you want to create. If you have RData files that will result (after the rbind) into a 40GB object, then you will need over 100GB of physical memory since the rbind operation will be creating a new object of 40GB from the separate files that total 40GB, so that is 80GB right there. If you then want to do some operations on an object that large, you might be making copies, so you need the memory.
Maybe you should consider keeping the data in a relational database and then use the SELECT operator to get just the data you need. Also the aggregation operators might be useful to reduce the size of physical memory that you need. On Fri, Jul 26, 2013 at 11:04 AM, David Winsemius <dwinsem...@comcast.net>wrote: > > On Jul 25, 2013, at 7:17 AM, Dark wrote: > > > Hi, > > > > Yes maybe I should have been more clear on my problem. > > I want to append the different data-frames back into one variable ( > rbind ) > > and save it as one R Data file. > > > > Indeed. That was the operation I had in mind when I made my suggestions. > Perhaps you need to create a set of toy dataframes with similar structure > and then the audience can propose solutions. That's the usual process > around these parts. > > -- > David. > > > > Regards Derk > > > > > > > > -- > > View this message in context: > http://r.789695.n4.nabble.com/Saving-multiple-rda-files-as-one-rda-file-tp4672041p4672313.html > > Sent from the R help mailing list archive at Nabble.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. > > David Winsemius > Alameda, CA, USA > > ______________________________________________ > 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. > -- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it. [[alternative HTML version deleted]] ______________________________________________ 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.
