The R Project SVN R-packages

R Under development (unstable) (2013-12-04 r64388) -- "Unsuffered Consequences"
Copyright (C) 2013 The R Foundation for Statistical Computing
Platform: x86_64-apple-darwin13.0.0 (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(foreign)
> 
> DF <- data.frame(X1 = 1:3, X2 = 4:6, X3 = paste0("str_", 1:3), 
+                  stringsAsFactors = FALSE)
> 
> write.foreign(DF, "datafile.dat", "codefile.sps", "SPSS")
> 
> files <- c( "datafile.dat", "codefile.sps")
> for(f in files) tools::Rdiff(f, file.path("keep", f))
> unlink(files)
> 
> proc.time()
   user  system elapsed 
  0.223   0.031   0.239