/**
* returns a single Double result. Assumes that the R code uses the variable "results" for storing
* the results of the process.
*
* @param template
* @return
*/
protected Double getSingleResult(String template) {
code.clear();
code.addRCode(template);
String call = "results";
caller.setRCode(code);
caller.runAndReturnResultOnline(call);
String[] res = caller.getParser().getAsStringArray(call);
// the codestore is always updated at the end of the operation
addToCodestore(code, call);
return convertStringToNumber(res[0]);
}
protected void installPackageIfNotInstalled(String packageName) {
code.clear();
code.addRCode(
"if(!('"
+ packageName
+ "' %in% installed.packages()[,\"Package\"])){install.packages('"
+ packageName
+ "')}");
caller.setRCode(code);
String call = "library('" + packageName + "')";
caller.runAndReturnResultOnline("library('" + packageName + "')");
// the codestore is always updated at the end of the operation
addToCodestore(code, call);
}