Dear all, 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... Regards, Jaroslav ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
