On 6 December 2015 at 18:36, Ing. Jaroslav Kuchař wrote: | in our ongoing project we use Java implementations of several | algorithms. We also provide a “wrapper” implemented as an R package | using rJava (https://github.com/jaroslav-kuchar/rCBA). Based on our | recent experiments, the significant portion of time is spent on copying | a dataframe from R to Java. The Java implementation needs access to the | source dataframe. | | I have tested several approaches: calling Java method row-by-row; | serialize the whole data-frame to a temp file and parsing in Java; or | row binding to a single vector and calling a single Java method. Each | approach has its limitations e.g. time-consuming row-by-row copying, | serialization and parsing performance or memory limitations of a single | vector. | | Is there an efficient approach how to copy a dataframe from R to Java | and another one from Java to R? | | Thanks for any help you can provide...
Have you looked at the gold standard that is Rserve and its dedicated clients, starting with the Java one? Dirk -- http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
