JFreeChart How to get data points displayed on a Time series chart
java, jfreechart, swing
Solution
`JFreeChart.createTimeSeriesChart()` uses an `XYLineAndShapeRenderer`, so start by making the shapes visible.
renderer.setSeriesShapesVisible(true);
This related example illustrates a few of the other methods that affect the appearance.
Problem
I just want to get the data points on my chart to show up, how do I do this? The plot shows up fine as a line plot but I want small markers for each individual data point. JFreeChart portion of the app is: ``` private XYDataset createDataset() { final TimeSeries inclinometerAngles = new TimeSeries(TimeUnit.SECONDS); // Add all data from the map to the dataset final Set<Date> keys = data.keySet(); for (Date date : keys) { Record r = data.get(date); if (r.mcInclinometerAngle != null) { inclinometerAngles.add(new Second(date), r.mcInclinometerAngle); } } final TimeSeriesCollection dataset = new TimeSeriesCollection(); dataset.addSeries(inclinometerAngles); return dataset; } private void setupGraphics() { final XYDataset dataset = createDataset(); final JFreeChart chart = createChart(dataset); final ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPreferredSize(new java.awt.Dimension(500, 270)); chartPanel.setMouseZoomable(true, false); setContentPane(chartPanel); } private JFreeChart createChart(final XYDataset dataset) { final JFreeChart chart = ChartFactory.createTimeSeriesChart( "Tracker Analysis", "Date", "Value", dataset, true, true, false ); final XYPlot plot = chart.getXYPlot(); XYItemRenderer renderer = plot.getRenderer(); final StandardXYToolTipGenerator g = new StandardXYToolTipGenerator( StandardXYToolTipGenerator.DEFAULT_TOOL_TIP_FORMAT, new SimpleDateFormat(), new DecimalFormat("0.00") ); renderer.setToolTipGenerator(g); renderer.setItemLabelsVisible(true); return chart; } ```