public void setXY(double x, double y) {
xaxis.setLocation(y); // Added by Paco
yaxis.setLocation(x); // Added by Paco
}
public void setX(double x) {
yaxis.setLocation(x); // Added by Paco
}
public void centerAxes(DrawingPanel panel) {
xaxis.setLocation((panel.getYMax() + panel.getYMin()) / 2);
yaxis.setLocation((panel.getXMax() + panel.getXMin()) / 2);
}