rCall = "result = filter(dataset, mag.low=" + lowMagDouble + ", mag.up=" + upMagDouble + ")";
parameters.put("lowMag", lowMagDouble);
parameters.put("upMag", upMagDouble);
filter = new JavaFilterByMagnitude();
} else if (jRBByF.isSelected()) {
String lowF = jTextFieldFLow.getText();
String upF = jTextFieldFUp.getText();
double lowFDouble = Double.parseDouble(lowF);