Example usage for org.jfree.data.statistics SimpleHistogramDataset SimpleHistogramDataset

Introduction

In this page you can find the example usage for org.jfree.data.statistics SimpleHistogramDataset SimpleHistogramDataset.

Prototype

public SimpleHistogramDataset(Comparable key) 

Source Link

Document

Creates a new histogram dataset.

Usage

From source file:info.financialecology.finance.utilities.datastruct.VersatileChart.java

public JFreeChart drawSimpleHistogram(String name, ArrayList<VersatileTimeSeries> atsArray) {
    JFreeChart chart;/* ww w .j a va 2 s.c o m*/
    int count = 0;
    double min = 0, max = 0, tmpMin, tmpMax;

    for (VersatileTimeSeries ats : atsArray) {
        if (count == 0) {
            min = ats.getMinY();
            max = ats.getMaxY();
        } else {
            tmpMin = ats.getMinY();
            tmpMax = ats.getMaxY();
            min = tmpMin < min ? tmpMin : min;
            max = tmpMax > max ? tmpMax : max;
        }
    }

    max = max > 0 ? max * 1.05 : max / 1.05;
    min = min > 0 ? min / 1.05 : min * 1.05;

    SimpleHistogramDataset dataSet = new SimpleHistogramDataset(name);

    for (int i = 0; i < params.numBins; i++) {
        double start = min + i * ((max - min) / params.numBins);
        double end = start + ((max - min) / params.numBins) * 0.999999999999;

        SimpleHistogramBin histBin = new SimpleHistogramBin(start, end, true, true);
        dataSet.addBin(histBin);
    }

    for (VersatileTimeSeries ats : atsArray) {
        for (int i = 0; i < ats.getItemCount(); i++) {
            double value = ats.getValue(i).doubleValue();

            try {
                dataSet.addObservation(ats.getValue(i).doubleValue());
            } catch (Throwable t) {
                // sometimes this throws an exception when the value falls within the narrow gaps of the bins
            }
        }
    }
    chart = ChartFactory.createHistogram(params.title, params.xLabel, params.yLabel, dataSet,
            PlotOrientation.VERTICAL, params.legend, params.toolTips, false);

    return chart;
}

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From source file:jchrest.gui.Shell.java

private JPanel getHistogramPane(Map<Integer, Integer> contentSizes, String label, String title, String xAxis) {
    int largest = 0;
    for (Integer key : contentSizes.keySet()) {
        if (key > largest)
            largest = key;/*from ww w  . j  ava2s . c o m*/
    }
    SimpleHistogramDataset dataset = new SimpleHistogramDataset(label);
    for (int i = 0; i <= largest; ++i) {
        SimpleHistogramBin bin = new SimpleHistogramBin((double) i, (double) (i + 1), true, false);
        int count = 0;
        if (contentSizes.containsKey(i)) {
            count = contentSizes.get(i);
        }
        bin.setItemCount(count);
        dataset.addBin(bin);
    }
    PlotOrientation orientation = PlotOrientation.VERTICAL;
    boolean show = false;
    boolean toolTips = true;
    boolean urls = false;
    JFreeChart chart = ChartFactory.createHistogram(title, xAxis, "frequency", dataset, orientation, show,
            toolTips, urls);

    JPanel panel = new JPanel();
    panel.setLayout(new BorderLayout());
    panel.add(new ChartPanel(chart, 400, 300, 200, 100, 600, 600, true, true, true, true, true, true));
    JButton saveButton = new JButton("Save Data");
    saveButton.setToolTipText("Save the histogram data to a CSV file");
    saveButton.addActionListener(new SaveHistogramActionListener(this, contentSizes));
    panel.add(saveButton, BorderLayout.SOUTH);
    return panel;
}

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