Using R from Scala and invoking Scala from R?

Question

Do you know something about possibilites of

• invoking Scala from R and
• using R (libraries) from within Scala?

Best regards

Raffael

Answer 1

Check out the jvmr package in R available on CRAN. It allows you to:

1. embed the R interpreter in Scala
2. embed the Scala interpreter/compiler in R.

It also allows you to do the same with Java. An article describing its usage is here. (Disclosure: I'm the author.)

Answer 2

There is an R package on CRAN for exactly this purpose, called "rscala". It allows bi-directional calling (R from Scala and Scala from R), as well as callbacks (eg. calling back to R from Scala code called from R). It is well documented. This package replaces the "jvmr" package mentioned in another answer.