callback

Type Members

1. class RClient extends Dynamic

   

   An interface to an R interpreter.

   An interface to an R interpreter.

   An object R is the instance of this class available in a Scala interpreter created by calling the function scalaInterpreter from the package rscala. It is through this instance R that callbacks to the original R interpreter are possible.

   In a JVM-based application, an instance of this class is created using its companion object. See below. The paths of the rscala's JARs, for both Scala 2.10 and 2.11, are available from R using rscala::rscalaJar(). To get just the JAR for Scala 2.11, for example, use rscala::rscalaJar("2.11").

   val R = org.ddahl.rscala.callback.RClient()
   
   val a = R.evalD0("rnorm(8)")
   val b = R.evalD1("rnorm(8)")
   val c = R.evalD2("matrix(rnorm(8),nrow=4)")
   
   R eval """
     v <- rbinom(8,size=10,prob=0.4)
     m <- matrix(v,nrow=4)
   """
   val v1 = R.get("v")
   val v2 = R.get("v")._1.asInstanceOf[Array[Int]]   // This works, but is not very convenient
   val v3 = R.v._1.asInstanceOf[Array[Int]]          // Slightly better
   val v4 = R.getI0("v")   // Get the first element of R's "v" as a Int
   val v5 = R.getI1("v")   // Get R's "v" as an Array[Int]
   val v6 = R.getI2("m")   // Get R's "m" as an Array[Array[Int]]

2. case class RObject(name: String) extends Product with Serializable

   

   A class used to wrap an arbitrary R object.

   A class used to wrap an arbitrary R object.

   val R = org.ddahl.rscala.callback.RClient()
   R.a = Array(1,2,3,4,5)
   val ref = R.evalR("as.list(a)")
   R.evalD0(s"sum(unlist(${ref}))")