An example of the JDataFrame being used to convert data in Groovy into a data frame in the R Project for Statistical Computing

JDataFrameExample.R

groovyJars <- list (
    "C:/development/projects/rGroovy/groovy.jars/groovy-2.4.5-indy.jar",
    "C:/development/projects/rGroovy/groovy.jars/ivy-2.4.0.jar"
)

options(GROOVY_JARS=groovyJars)

library(rGroovy)

rGroovy::Initialize()

script <- paste (
    "@Grab(group='com.coherentlogic.r.integration', module='jdataframe-core', version='0.8.5-RELEASE')",
    "import com.coherentlogic.r.integration.data.frame.JDataFrameBuilder",
    "def codes = ['WV', 'VA'] as String[]",
    "def descriptions = ['West Virginia', 'Virginia'] as String[]",
    "return new JDataFrameBuilder()",
    ".addColumn('Code', codes)",
    ".addColumn('Description', descriptions)",
    ".toJson()", sep="n")

json <- rGroovy::Evaluate(groovyScript = script)

temp <- RJSONIO::fromJSON(json)
tempDF <- as.data.frame(temp)
tempDF