comprehensive r binary path

src/output/mcqr/mcqrdata.cpp

@@ -596,12 +596,13 @@ void
 McqrRdata::mergeTheRDataFiles(const QString script_path)
 {
   QSettings settings;
-  QString r_path = settings.value("mcqr/r_path", "/usr/bin/Rscript").toString();
+  QString rscript_binary_path =
+    settings.value("path/rscript_binary", "Rscript").toString();
   QStringList script_path_param;
   script_path_param << script_path;
 
   QProcess *r_process = new QProcess();
-  r_process->start(r_path, script_path_param);
+  r_process->start(rscript_binary_path, script_path_param);
 
   if(!r_process->waitForStarted())
     {
@@ -627,7 +628,7 @@ McqrRdata::mergeTheRDataFiles(const QString script_path)
       delete r_process;
       throw pappso::PappsoException(
         QObject::tr("error executing R process Status != 0 : %1 %2\n%3")
-          .arg(r_path)
+          .arg(rscript_binary_path)
           .arg(script_path_param.join(" ").arg(result.data())));
     }
 }