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

Introduction

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

Prototype

public HistogramBin(double startBoundary, double endBoundary) 

Source Link

Document

Creates a new bin.

Usage

From source file:org.jfree.data.statistics.HistogramBinTest.java

/**
 * Confirm that the equals method can distinguish all the required fields.
 */// w w w  .java2  s .c  om
@Test
public void testEquals() {
    double start = 10.0;
    double end = 20.0;
    HistogramBin b1 = new HistogramBin(start, end);
    HistogramBin b2 = new HistogramBin(start, end);
    assertEquals(b1, b2);
}

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From source file:org.jfree.data.statistics.HistogramBinTest.java

/**
 * Confirm that cloning works./*  w w w.  j a  va 2  s .c  o m*/
 */
@Test
public void testCloning() throws CloneNotSupportedException {
    double start = 10.0;
    double end = 20.0;
    HistogramBin b1 = new HistogramBin(start, end);
    HistogramBin b2 = (HistogramBin) b1.clone();
    assertTrue(b1 != b2);
    assertTrue(b1.getClass() == b2.getClass());
    assertTrue(b1.equals(b2));
}

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From source file:org.jfree.data.statistics.HistogramBinTest.java

/**
 * Serialize an instance, restore it, and check for equality.
 */// w ww. j a v  a2  s  .  c  o m
@Test
public void testSerialization() {
    double start = 10.0;
    double end = 20.0;
    HistogramBin b1 = new HistogramBin(start, end);
    HistogramBin b2 = (HistogramBin) TestUtilities.serialised(b1);
    assertEquals(b1, b2);
}

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From source file:org.jfree.data.statistics.HistogramDataset.java

/**
 * Adds a series to the dataset. Any data value less than minimum will be
 * assigned to the first bin, and any data value greater than maximum will
 * be assigned to the last bin.  Values falling on the boundary of
 * adjacent bins will be assigned to the higher indexed bin.
 *
 * @param key  the series key (<code>null</code> not permitted).
 * @param values  the raw observations./*  ww  w .j  ava 2s . c  o  m*/
 * @param bins  the number of bins (must be at least 1).
 * @param minimum  the lower bound of the bin range.
 * @param maximum  the upper bound of the bin range.
 */
public void addSeries(Comparable key, double[] values, int bins, double minimum, double maximum) {

    ParamChecks.nullNotPermitted(key, "key");
    ParamChecks.nullNotPermitted(values, "values");
    if (bins < 1) {
        throw new IllegalArgumentException("The 'bins' value must be at least 1.");
    }
    double binWidth = (maximum - minimum) / bins;

    double lower = minimum;
    double upper;
    List binList = new ArrayList(bins);
    for (int i = 0; i < bins; i++) {
        HistogramBin bin;
        // make sure bins[bins.length]'s upper boundary ends at maximum
        // to avoid the rounding issue. the bins[0] lower boundary is
        // guaranteed start from min
        if (i == bins - 1) {
            bin = new HistogramBin(lower, maximum);
        } else {
            upper = minimum + (i + 1) * binWidth;
            bin = new HistogramBin(lower, upper);
            lower = upper;
        }
        binList.add(bin);
    }
    // fill the bins
    for (int i = 0; i < values.length; i++) {
        int binIndex = bins - 1;
        if (values[i] < maximum) {
            double fraction = (values[i] - minimum) / (maximum - minimum);
            if (fraction < 0.0) {
                fraction = 0.0;
            }
            binIndex = (int) (fraction * bins);
            // rounding could result in binIndex being equal to bins
            // which will cause an IndexOutOfBoundsException - see bug
            // report 1553088
            if (binIndex >= bins) {
                binIndex = bins - 1;
            }
        }
        HistogramBin bin = (HistogramBin) binList.get(binIndex);
        bin.incrementCount();
    }
    // generic map for each series
    Map map = new HashMap();
    map.put("key", key);
    map.put("bins", binList);
    map.put("values.length", new Integer(values.length));
    map.put("bin width", new Double(binWidth));
    this.list.add(map);
    fireDatasetChanged();
}

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