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...as a whole. Could you please send any reference to more examples or documentation that can help me? The main goal is to copy a full dataframe from R to Java. Best regards, Jaroslav On 2015-12-07 03:19, Simon Urbanek wrote: > On Dec 6, 2015, at 12:36 PM, Ing. Jaroslav Kucha? > <jaroslav.kuchar at fit.cvut.cz> wrote: > >> 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 >> recen...

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...

...u wouldn't pass the entire df but instead have methods for the types you care about as the modeling function - that's more Java-like approach, but either is valid and there is no difference in efficiency. Cheers, Simon > On Dec 15, 2015, at 12:50 PM, Ing. Jaroslav Kucha? <jaroslav.kuchar at fit.cvut.cz> wrote: > > Dear all, > > thank you for your hints. I would prefer to do not use Rserve as Dirk > mentioned. > > @Simon > I have full control over the Java implementation - I can adapt the code > that I use for the communication R <-> Java. &g...

On Dec 6, 2015, at 12:36 PM, Ing. Jaroslav Kucha? <jaroslav.kuchar at fit.cvut.cz> wrote: > 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 significa...