plot1.setAngleGridlineStroke(s);
assertFalse(plot1.equals(plot2));
plot2.setAngleGridlineStroke(s);
assertEquals(plot1, plot2);
plot1.setAngleTickUnit(new NumberTickUnit(11.0));
assertFalse(plot1.equals(plot2));
plot2.setAngleTickUnit(new NumberTickUnit(11.0));
assertEquals(plot1, plot2);
plot1.setAngleGridlinesVisible(false);
assertFalse(plot1.equals(plot2));
plot2.setAngleGridlinesVisible(false);