How To Download Jfreechart
Annegret Mclean
Click on the following link to download a runnable jar file that demonstrates some of the capabilities of JFreeChart:
- jfreechart-demo-1.5.2-jar-with-dependencies.jar
- java -jar jfreechart-demo-1.5.2-jar-with-dependencies.jar
I was having this issue as well. It comes from adding all of the jars in the JFreeChart lib to the build path. By removing the unnecessary and adding only the jfreechart-1.0.19 and jcommon-1.0.23 jars, my applications started running with the window and chart displayed.
Can someone tell me how to change samples of series color in legend in jfreechart. What I have now is small line of series color eg:
I would like to have square sample of those colors. Here is an example
In this article we learn how to use JFreeChart. We show how to create varioustypes of charts. The charts are displayed in a Swing application and saved to animage file. We use a Java servlet to create and render a chart in a web browserand retrieve data for a chart from a MySQL database.JFreeChart libraryA chart is a drawing that shows information in a simple way, often using linesand curves to show amounts. JFreeChart is a popular Java library forcreating charts. JFreeChart allows to create a wide variety of both interactiveand non-interactive charts. We can create line charts, bar charts, area charts,scatter charts, pie charts, gantt charts and various specialized charts such aswind chart or bubble chart.JFreeChart is extensively customizable; it allows to modify colours and paintsof chart items, legends, styles of the lines or markers. It automatically drawsthe axis scales and legends. Charts have a built-in capability to zoom in withmouse. The existing charts can be easily updated through the listeners that thelibrary has on its data collections. It supports multiple output formatsincluding PNG, JPEG, PDF, and SVG.JFreeChart was started by David Gilbert in 2000. Today, JFreeChart is the mostwidely used charting library among Java developers.JFreeChart Maven dependency org.jfree jfreechart 1.5.3For our projects we use this Maven dependency.JFreeChart histogramA histogram is an accurate representation of the distribution of numerical data.It is an estimate of the probability distribution of a continuous variable.com/zetcode/HistogramEx.javapackage com.zetcode;import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartUtils;import org.jfree.chart.JFreeChart;import org.jfree.data.statistics.HistogramDataset;import java.io.File;import java.io.IOException;public class HistogramEx public static void main(String[] args) throws IOException double[] vals = 0.71477137, 0.55749811, 0.50809619, 0.47027228, 0.25281568, 0.66633175, 0.50676332, 0.6007552, 0.56892904, 0.49553407, 0.61093935, 0.65057417, 0.40095626, 0.45969447, 0.51087888, 0.52894806, 0.49397198, 0.4267163, 0.54091298, 0.34545257, 0.58548892, 0.3137885, 0.63521146, 0.57541744, 0.59862265, 0.66261386, 0.56744017, 0.42548488, 0.40841345, 0.47393027, 0.60882106, 0.45961208, 0.43371424, 0.40876484, 0.64367337, 0.54092033, 0.34240811, 0.44048106, 0.48874236, 0.68300902, 0.33563968, 0.58328107, 0.58054283, 0.64710522, 0.37801285, 0.36748982, 0.44386445, 0.47245989, 0.297599, 0.50295541, 0.39785732, 0.51370486, 0.46650358, 0.5623638, 0.4446957, 0.52949791, 0.54611411, 0.41020067, 0.61644868, 0.47493691, 0.50611458, 0.42518211, 0.45467712, 0.52438467, 0.724529, 0.59749142, 0.45940223, 0.53099928, 0.65159718, 0.38038268, 0.51639554, 0.41847437, 0.46022878, 0.57326103, 0.44913632, 0.61043611, 0.42694949, 0.43997814, 0.58787928, 0.36252603, 0.50937634, 0.47444256, 0.57992527, 0.29381335, 0.50357977, 0.42469464, 0.53049697, 0.7163579, 0.39741694, 0.41980533, 0.68091159, 0.69330702, 0.50518926, 0.55884098, 0.48618324, 0.48469854, 0.55342267, 0.67159111, 0.62352006, 0.34773486; var dataset = new HistogramDataset(); dataset.addSeries("key", vals, 50); JFreeChart histogram = ChartFactory.createHistogram("Normal distribution", "y values", "x values", dataset); ChartUtils.saveChartAsPNG(new File("histogram.png"), histogram, 450, 400); In the example, we generate a histogram for a random distribution of values.The chart is generated into a PNG file and saved on the disk.var dataset = new HistogramDataset();dataset.addSeries("key", vals, 50);Histogram chart displays values in a HistogramDataset.The second argument of the addSeries method is thearray of double values. The third is the number of bins, i.e. thenumber of rectangles drawn on the chart.JFreeChart histogram = ChartFactory.createHistogram("Normal distribution", "y values", "x values", dataset);A histogram is created with the ChartFactory.createHistogrammethod.ChartUtils.saveChartAsPNG(new File("histogram.png"), histogram, 450, 400);We write the chart to a PNG image with ChartUtils.saveChartAsPNG.JFreeChart line chartA line chart is a basic type of chart which displays information as a series of data pointsconnected by straight line segments. A line chart in JavaFX is created withthe ChartFactory.createXYLineChart.
Before this demo works, you need to download JFreeChart and make matlab get to know with it. There are 2
ways you can do this:
1. Add the jcommon and jfreechart jar to the dynamic matlab JavaClassPath (uncommented lines in the first
cell an change path to your local installation path)
2. Add the jcommon and jfreechart jar to the static matlab JavaClassPath (see Matlab Help, modify
classpath.txt on matlabroot\toolbox\local)