jfreechart - w3toppers.com

Changing shape of single point in JFreeChart XYPLot

ChartFactory.createScatterPlot() instantiates an XYLineAndShapeRenderer. You can replace the renderer with one that lets you selectively replace the Shape returned by getItemShape(), as shown below. xyPlot.setRenderer(new XYLineAndShapeRenderer(false, true) { @Override public Shape getItemShape(int row, int col) { if (row == 0 & col == N) { return ShapeUtilities.createDiagonalCross(5, 2); } else { return super.getItemShape(row, col); } … Read more

Avoid item label overlap in time series 1D plots (JFreeChart)

You might experiment with some combination of pan and zoom using setDomainPannable() and setMouseWheelEnabled(), seen here and here. Right-click to see the context menu and control-click to pan (option-click on Mac OS X).

Prevent JFreeChart DialPlot wrapping around with large values?

I would be interested to hear if there are better methods. The disparity between the DialValueIndicator and the maximumValue may be confusing. As an alternative, signify distinct ranges using StandardDialRange: int redLine = 3 * maximumValue / 5; plot.addLayer(new StandardDialRange(minimumValue, redLine, Color.blue)); plot.addLayer(new StandardDialRange(redLine, maximumValue, Color.red)); Setting the frame’s preferred size is problematic. Instead, override … Read more

Multiple graphs in multiple figures using jFreeChart

I know the way I use swingworker is wrong! I dont know how to fix it Before start I have some tips: Get rid of the arrays: you have several of them and you’ll see they only mess the things up because you’ll need indexes and loops everywhere to work with them and it’s too … Read more

Choose the series of data that you want to display

As shown here, JCheckBox is more flexible, but clicking directly on the chart may be more convenient. The example below adds a ChartMouseListener that makes a series invisible when clicking on either an XYItemEntity in the series or its LegendItemEntity. Of course, once a series is invisible, it cannot be clicked on again; you’ll need … Read more

JFreeChart – Problem in creating moving chart

You’ll need to create your own SlidingXYDataset that implements XYDataset in a manner similar to how SlidingCategoryDataset implements CategoryDataset. Addendum: As noted in a comment, a typical implementation can be found here.

Creating a time series with jfreechart

You might have a look at org.jfree.chart.demo.TimeSeriesChartDemo1, and the associated API documentation. A typical command to run the demo might look like this: java -cp lib/jfreechart-1.0.13.jar:lib/jcommon-1.0.16.jar \ org.jfree.chart.demo.TimeSeriesChartDemo1 The example uses org.jfree.data.time.Month to represent monthly data, but other units are available in org.jfree.data.time. See also the approach shown in this related example, which is based … Read more

jfreechart customize piechart to show absolute values and percentages

Use the MessageFormat symbol {1} for the absolute section value. See StandardPieSectionLabelGenerator for details. public class MyMinimalPieChartExample { private static final String KEY1 = “Datum 1”; public static final String KEY2 = “Datum 2”; public static void main(String[] args) { DefaultPieDataset dataset = new DefaultPieDataset(); dataset.setValue(KEY1, 99); dataset.setValue(KEY2, 77); JFreeChart someChart = ChartFactory.createPieChart( “Header”, dataset, … Read more

Using JFreeChart Scatter Plots is there a Way to Subdivide Styles for Data Sets?

You might consider the approaches mentioned here. The first implements DrawingSupplier, as shown here: class DefaultDrawingSupplier implements DrawingSupplier… The second extends DefaultDrawingSupplier, as shown here, to achieve a similar effect. Paint[] paintArray = {…}; plot.setDrawingSupplier(new DefaultDrawingSupplier( paintArray, … DefaultDrawingSupplier.DEFAULT_SHAPE_SEQUENCE)); Of course, you can always override getItemPaint(), as shown here.