How to graph the data from an array using JFreeChart?

Question

I need to draw a graph so that on the x axis there will be "i" data, and on the y axis there will be "massAngle [i]" data. I tried to do it this way:

for (int i = 0; i < massAngle.length; i++) {
    XYSeries series = new XYSeries("1");
    series.add(i, massAngle[i]);

    XYSeriesCollection seriesCollection = new XYSeriesCollection(series);
    final JFreeChart chart = ChartFactory.createXYLineChart("Долгота и Широта",
            "Долгота", "Широта", seriesCollection, PlotOrientation.VERTICAL, true, true, false);

    final ChartPanel chartPanel = new ChartPanel(chart);
    chartPanel.setPreferredSize(new Dimension(1150, 470));
    panel.add(chartPanel);
}

I don't know JFreeChart very well, but in your code you are creating a new chart for every angle. I don't think that's what you want. I'd try to put everything outside the loop except for series.add(...) — Tobias Brösamle
– Tobias Brösamle, Commented May 17, 2018 at 11:10

azro · Accepted Answer · 2018-05-17 11:25:18Z

1

You are creating a new XYSeriesCollection, a new JFChart a new ChartPanel for each element of your array, you have to do it once : create a XYSeries add all your data and build one chart :

XYSeries series = new XYSeries("1");
for (int i = 0; i < massAngle.length; i++) {
    series.add(i, massAngle[i]);
}

XYSeriesCollection seriesCollection = new XYSeriesCollection(series);
final JFreeChart chart = ChartFactory.createXYLineChart("Долгота и Широта", "Долгота", 
                 "Широта", seriesCollection, PlotOrientation.VERTICAL, true, true, false);

final ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new Dimension(1150, 470));
panel.add(chartPanel);

answered May 17, 2018 at 11:25

azro

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1 Comment

azro Over a year ago

@VIRICH ;) don't hesite to accept/vote up the answer, it'll guide the new people which look for accepted post at first ;)

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