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

Introduction

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

Prototype

public void addObservations(double[] values) 

Source Link

Document

Adds a set of values to the dataset and sends a DatasetChangeEvent to all registered listeners.

Usage

From source file:org.jfree.expdemo.SelectionDemo4.java

/**
 * Creates a sample {@link HistogramDataset}.
 * //from   ww w  . j a va2 s.  c  om
 * @return the dataset.
 */
private static IntervalXYDataset createDataset() {
    SimpleHistogramDataset dataset = new SimpleHistogramDataset("H1");
    double lower = 0.0;
    for (int i = 0; i < 100; i++) {
        double upper = (i + 1) / 10.0;
        SimpleHistogramBin bin = new SimpleHistogramBin(lower, upper, true, false);
        dataset.addBin(bin);
        lower = upper;
    }
    double[] values = new double[1000];
    Random generator = new Random(12345678L);
    for (int i = 0; i < 1000; i++) {
        values[i] = generator.nextGaussian() + 5;
    }
    dataset.addObservations(values);
    return dataset;
}

---

From source file:ch.zhaw.ias.dito.ui.AnalysisPanel.java

private JFreeChart createHistogramChart(String title, Matrix distanceMatrix) {
    int NUM_OF_BINS = 50;
    SimpleHistogramDataset dataset = new SimpleHistogramDataset("");
    dataset.setAdjustForBinSize(false);/*from   www .j a v  a  2 s . c om*/
    double min = distanceMatrix.extremum(false);
    double max = distanceMatrix.extremum(true);
    double spacing = (max - min) / NUM_OF_BINS;
    double currentBound = min;

    for (int i = 0; i < NUM_OF_BINS - 1; i++) {
        dataset.addBin(new SimpleHistogramBin(currentBound, (currentBound + spacing), true, false));
        currentBound += spacing;
    }
    //ensure that the maximum is included and not lost because of numerical problems
    dataset.addBin(new SimpleHistogramBin(currentBound, max, true, true));
    for (int i = 0; i < distanceMatrix.getColCount(); i++) {
        DVector v = distanceMatrix.col(i);
        dataset.addObservations(v.getValues());
    }
    return ChartFactory.createHistogram(title, Translation.INSTANCE.get("misc.graphic.distance"),
            Translation.INSTANCE.get("misc.graphic.frequency"), dataset, PlotOrientation.VERTICAL, false, true,
            false);
}

---