Even though you’re using a LogAxis
, you can specify integer tick units, as shown in the variation of @amaidment’s example below.
/** @see http://stackoverflow.com/a/10353270/230513 */
private static void createFrame() {
XYSeries series = new XYSeries("Series");
for (int i = 0; i <= N; i++) {
series.add(i, Math.pow(2, i));
}
NumberAxis xAxis = new NumberAxis("X");
xAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
LogAxis yAxis = new LogAxis("Y");
yAxis.setBase(2);
yAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
XYPlot plot = new XYPlot(new XYSeriesCollection(series),
xAxis, yAxis, new XYLineAndShapeRenderer(true, false));
JFreeChart chart = new JFreeChart(
"Chart", JFreeChart.DEFAULT_TITLE_FONT, plot, false);
JFrame frame = new JFrame("LogAxis Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(new ChartPanel(chart));
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
createFrame();
}
});
}