Rcaller simple code - Error loading Runiversal

Question

I have the follow Java code that uses Rcaller.

RCaller caller = new RCaller();
RCode code = new RCode();

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

code.addRCode("install.packages(\"bbmle\")");
caller.redirectROutputToConsole();
caller.runOnly();

Essentially, I'm trying to run Java code that installs an R package (because later I will run R code within Java that requires this package).

When I run this code, I get the following output in Java

Error:Loading required package: Runiversal

However, I do have the Runiversal package on my Mac. Any ideas what this means, and why I'm not actually seeing any R output of the install.packages method, which is normally quite verbose?

---

UPDATE: I should note that even simple code such as the following results in the same error:

code.addRCode("x = c(1,2,3)");
code.addRCode("y = c(2,3,5");
code.addRCode("x+y");
caller.redirectROutputToConsole();
caller.runOnly();

---

UPDATE: I should also mention that the following works great:

StringBuffer allCode = readFile("temp.R");
code.setCode(allCode);

double[] xvector = new double[]{1,3,5,3,2,4,5,6,7,8,9,21,22,25,27,25,34,39,31};
double[] yvector = new double[]{6,7,5,6,5,6,6,7,6,8,9,21,20,19,23,24,29,38,30};
code.addDoubleArray("X",xvector);
code.addDoubleArray("Y",yvector);

code.addRCode("fun(X,Y)");

temp.R:

fun = function(x,y) {
    return(lm(y~x))
}

Java output:

Output:
Output:Call:
Output:lm(formula = y ~ x)
Output:
Output:Coefficients:
Output:(Intercept)            x  
Output:      2.445        0.825  
Output:

Answer 1

R loads package from the libraries. If the library that you installed the Runiversal package into is not being searched by the R process started under Java, that could result in the error message you're seeing.

So: what is the directory path (i.e., library) that the Runiversal package is installed in? Possibly related to this is what user installed the R package, and what user is running the Java code.

Answer 2

The 2.2 version of RCaller library does not require the R package Runiversal. A compact version of R to XML converters are implemented in the package. Try it out here