Chessxm wrote: > > Dear all, > > I have two questions. > > First, I am wondering whether we are able to use R to generate an exe > file, > or sth that can be executable outside R? > > >
It sounds as though you are looking for something similar to Matlab's mcc compiler that allows Matlab code to be compiled and run independently from the program by translating a script into C code. To my knowledge there are only two projects that have attempted something similar and both never progressed much past the experimental phase. The first was called Scompile and was created by a fellow named Matt Calder. The project has been defunct for a long time, but you might find some info at: http://www.stat.cmu.edu/~hseltman/Scompile.html Another recent project is r2c hosted at http://www.rforge.net . Both of these programs are extremely limited in the types of scripts they can convert and are probably wouldn't provide workable solution for a set of general R scripts. Your best shot at portability is probably to pack your code and/or data up into an R package- that way it can be easily loaded on to any computer which has R installed. Creating a package from an existing collection of R scripts and data objects is very, very easy- see ?package.skeleton() and the "Writing R Extensions" manual for starting points. Chessxm wrote: > > Second, I am wondering whether read.csv can read a csv file with size of > 300-400 gigabytes? > > Thank you very much! > > Min > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > > The problem here is that R likes to store all of it's variables in local RAM- allocating a data frame for 300+ gigabytes worth of information is likely to exceed your machine capacity. Many good workarounds exist for this- most of them function by storing the variable in a database file and only loading and accessing the parts that are needed at a given moment. See the package "filehash" for an example of how to do this. Hope this helps! -Charlie ----- Charlie Sharpsteen Undergraduate Environmental Resources Engineering Humboldt State University -- View this message in context: http://www.nabble.com/Can-we-generate-exe-file-using-R--What-is-the-maximum-file-size-valid--tp23417745p23420090.html Sent from the R devel mailing list archive at Nabble.com. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
