jsr223 (version 0.3.4)

jsr223-package: A Java Platform Integration for R with Programming Languages Groovy, JavaScript, JRuby (Ruby), Jython (Python), and Kotlin

Description

The jsr223 package provides a high-level integration for Java that makes Java objects easy to use from within R and simplifies bi-directional data exchange for a wide variety of objects. Furthermore, jsr223 employs the Java Scripting API to bring several scripting languages to the R software environment: JavaScript, Ruby, Python, Groovy, and Kotlin.

Details

The complete documentation is in the jsr223 User Manual. It includes in-depth code examples and it covers details, such as data exchange, that cannot be addressed easily in the R documentation.

See Also

ScriptEngine

Examples

# NOT RUN {
# Simple example embedding JavaScript.
library("jsr223")
engine <- ScriptEngine$new("javascript")
engine$radius <- 4
engine %~% "var area = Math.PI * Math.pow(radius, 2)"
cat ("The area of the circle is ", engine$area, ".\n", sep = "")

# Use callbacks to set values, get values, and execute R code
# in the current R session via the global R object.
# Access R from JavaScript.
engine %@% "R.set('a', 12);"
engine %@% "print(\"The value of 'a' is \" + R.get('a') + \".\");"
engine %@% "var randomNormal = R.eval('rnorm(5)');"
engine$randomNormal

# Use a Java object.
engine$randomNormal <- rnorm(5)
engine$randomNormal
engine %@% "java.util.Arrays.sort(randomNormal)"
engine$randomNormal

# Close the engine and release resources.
engine$terminate()
# }