Handling all variables in a workspace in R with RCaller

It is known that the R assigns a value to a variable name by using the Assignment Symbol <- which corresponds to assign function.

RCaller handles results as list objects. Since R environments are list s, they can easily be converted to R lists (Visit the previous blog post on R list here).

Here is an example of RCaller on getting all variables that are created in the run time in R side.

package rcallerenvironments;

import rcaller.RCaller;

import rcaller.RCode;

public class RCallerEnvironments {

    public static void main(String[] args) {

        RCaller rcaller = new RCaller();

        RCode code = new RCode();

        rcaller.setRscriptExecutable("/usr/bin/Rscript");

        code.addRCode("a <- 3");

        code.addRCode("b <- 10.45");

        code.addRCode("d <- TRUE");

        code.addRCode("avector <- c(9,6,5,6)");

        code.addRCode("allvars <- as.list(globalenv())");

        rcaller.setRCode(code);

        rcaller.runAndReturnResult("allvars");

        System.out.println(rcaller.getParser().getNames());

        try {

            System.out.println(rcaller.getParser().getXMLFileAsString());

        } catch (Exception e) {

            System.out.println("Error in accessing XML");

        }

    }

}

The output is 

As it is seen in output, created variables avector, a, b and d are returned to Java side in a single call without any manual translations.

Have a nice read!