org.jfree.data.statistics.HistogramDataset Java Examples

public static JFreeChart createHistogramOld(double[] data, int bin, String yAxisLabel, double min,
    double max) {
  if (data != null && data.length > 0) {
    HistogramDataset dataset = new HistogramDataset();
    dataset.addSeries("histo", data, bin, min, max);

    JFreeChart chart = ChartFactory.createHistogram("", yAxisLabel, "n", dataset,
        PlotOrientation.VERTICAL, true, false, false);

    chart.setBackgroundPaint(new Color(230, 230, 230));
    chart.getLegend().setVisible(false);
    XYPlot xyplot = chart.getXYPlot();
    xyplot.setForegroundAlpha(0.7F);
    xyplot.setBackgroundPaint(Color.WHITE);
    xyplot.setDomainGridlinePaint(new Color(150, 150, 150));
    xyplot.setRangeGridlinePaint(new Color(150, 150, 150));
    xyplot.getDomainAxis().setVisible(true);
    xyplot.getRangeAxis().setVisible(yAxisLabel != null);
    XYBarRenderer xybarrenderer = (XYBarRenderer) xyplot.getRenderer();
    xybarrenderer.setShadowVisible(false);
    xybarrenderer.setBarPainter(new StandardXYBarPainter());
    // xybarrenderer.setDrawBarOutline(false);
    return chart;
  } else
    return null;
}
 

public static JFreeChart createHistogramOld(double[] data, int bin, String yAxisLabel, double min,
    double max) {
  if (data != null && data.length > 0) {
    HistogramDataset dataset = new HistogramDataset();
    dataset.addSeries("histo", data, bin, min, max);

    JFreeChart chart = ChartFactory.createHistogram("", yAxisLabel, "n", dataset,
        PlotOrientation.VERTICAL, true, false, false);

    chart.setBackgroundPaint(new Color(230, 230, 230));
    chart.getLegend().setVisible(false);
    XYPlot xyplot = chart.getXYPlot();
    xyplot.setForegroundAlpha(0.7F);
    xyplot.setBackgroundPaint(Color.WHITE);
    xyplot.setDomainGridlinePaint(new Color(150, 150, 150));
    xyplot.setRangeGridlinePaint(new Color(150, 150, 150));
    xyplot.getDomainAxis().setVisible(true);
    xyplot.getRangeAxis().setVisible(yAxisLabel != null);
    XYBarRenderer xybarrenderer = (XYBarRenderer) xyplot.getRenderer();
    xybarrenderer.setShadowVisible(false);
    xybarrenderer.setBarPainter(new StandardXYBarPainter());
    // xybarrenderer.setDrawBarOutline(false);
    return chart;
  } else
    return null;
}
 

public static JFreeChart createHistogramOld(double[] data, int bin, String yAxisLabel, double min,
    double max) {
  if (data != null && data.length > 0) {
    HistogramDataset dataset = new HistogramDataset();
    dataset.addSeries("histo", data, bin, min, max);

    JFreeChart chart = ChartFactory.createHistogram("", yAxisLabel, "n", dataset,
        PlotOrientation.VERTICAL, true, false, false);

    chart.setBackgroundPaint(new Color(230, 230, 230));
    chart.getLegend().setVisible(false);
    XYPlot xyplot = chart.getXYPlot();
    xyplot.setForegroundAlpha(0.7F);
    xyplot.setBackgroundPaint(Color.WHITE);
    xyplot.setDomainGridlinePaint(new Color(150, 150, 150));
    xyplot.setRangeGridlinePaint(new Color(150, 150, 150));
    xyplot.getDomainAxis().setVisible(true);
    xyplot.getRangeAxis().setVisible(yAxisLabel != null);
    XYBarRenderer xybarrenderer = (XYBarRenderer) xyplot.getRenderer();
    xybarrenderer.setShadowVisible(false);
    xybarrenderer.setBarPainter(new StandardXYBarPainter());
    // xybarrenderer.setDrawBarOutline(false);
    return chart;
  } else
    return null;
}
 

/**
 * Confirm that the equals method can distinguish all the required fields.
 */
public void testEquals() {
    double[] values = {1.0, 2.0, 3.0, 4.0, 6.0, 12.0, 5.0, 6.3, 4.5};
    HistogramDataset d1 = new HistogramDataset();
    d1.addSeries("Series 1", values, 5);
    HistogramDataset d2 = new HistogramDataset();
    d2.addSeries("Series 1", values, 5);

    assertTrue(d1.equals(d2));
    assertTrue(d2.equals(d1));

    d1.addSeries("Series 2", new double[] {1.0, 2.0, 3.0}, 2);
    assertFalse(d1.equals(d2));
    d2.addSeries("Series 2", new double[] {1.0, 2.0, 3.0}, 2);
    assertTrue(d1.equals(d2));
}
 

/**
 * Another check for the addSeries() method.
 */
public void testAddSeries2() {
    double[] values = {0.0, 1.0, 2.0, 3.0, 4.0, 5.0};
    HistogramDataset hd = new HistogramDataset();
    hd.addSeries("S1", values, 5);
    assertEquals(0.0, hd.getStartXValue(0, 0), EPSILON);
    assertEquals(1.0, hd.getEndXValue(0, 0), EPSILON);
    assertEquals(1.0, hd.getYValue(0, 0), EPSILON);
    assertEquals(1.0, hd.getStartXValue(0, 1), EPSILON);
    assertEquals(2.0, hd.getEndXValue(0, 1), EPSILON);
    assertEquals(1.0, hd.getYValue(0, 1), EPSILON);
    assertEquals(2.0, hd.getStartXValue(0, 2), EPSILON);
    assertEquals(3.0, hd.getEndXValue(0, 2), EPSILON);
    assertEquals(1.0, hd.getYValue(0, 2), EPSILON);
    assertEquals(3.0, hd.getStartXValue(0, 3), EPSILON);
    assertEquals(4.0, hd.getEndXValue(0, 3), EPSILON);
    assertEquals(1.0, hd.getYValue(0, 3), EPSILON);
    assertEquals(4.0, hd.getStartXValue(0, 4), EPSILON);
    assertEquals(5.0, hd.getEndXValue(0, 4), EPSILON);
    assertEquals(2.0, hd.getYValue(0, 4), EPSILON);
}
 

/**
 * Creates a {@link HistogramDataset} for this {@link com.rapidminer.belt.column.Column}.
 */
private HistogramDataset createHistogramDataset(final Table table) {
	HistogramDataset dataset = new HistogramDataset();

	double[] array = new double[table.height()];
	int count = 0;

	ObjectReader<Instant> reader = Readers.objectReader(table.column(getColumnName()),
			Instant.class);
	while(reader.hasRemaining()){
		Instant instant = reader.read();
		// don't use missing values because otherwise JFreeChart tries to plot them too which
		// can lead to false histograms
		if (instant !=null) {
			array[count++] = instant.getEpochSecond() * SECONDS_TO_MILLIS + instant.getNano() / MILLIS_TO_NANOS;
		}
	}

	// add points to data set (if any)
	if (count > 0) {
		// truncate array if necessary
		if (count < array.length) {
			array = Arrays.copyOf(array, count);
		}
		dataset.addSeries(getColumnName(), array, Math.min(array.length, MAX_BINS_HISTOGRAM));
	}

	return dataset;
}
 

/**
 * Some checks for bug 1553088.  An IndexOutOfBoundsException is thrown 
 * when a data value is *very* close to the upper limit of the last bin.
 */
public void test1553088() {
    double[] values = {-1.0, 0.0, -Double.MIN_VALUE, 3.0};
    HistogramDataset d = new HistogramDataset();
    d.addSeries("S1", values, 2, -1.0, 0.0);
    assertEquals(-1.0, d.getStartXValue(0, 0), EPSILON);
    assertEquals(-0.5, d.getEndXValue(0, 0), EPSILON);
    assertEquals(1.0, d.getYValue(0, 0), EPSILON);
    
    assertEquals(-0.5, d.getStartXValue(0, 1), EPSILON);
    assertEquals(0.0, d.getEndXValue(0, 1), EPSILON);
    assertEquals(3.0, d.getYValue(0, 1), EPSILON);
}
 

/**
 * This test is derived from a reported bug.
 */
public void testBinBoundaries() {
    double[] values = { -5.000000000000286E-5 };
    int bins = 1260;
    double minimum = -0.06307522528160199;
    double maximum = 0.06297522528160199;
    HistogramDataset d = new HistogramDataset();
    d.addSeries("S1", values, bins, minimum, maximum);
    assertEquals(0.0, d.getYValue(0, 629), EPSILON);
    assertEquals(1.0, d.getYValue(0, 630), EPSILON);
    assertEquals(0.0, d.getYValue(0, 631), EPSILON);
    assertTrue(values[0] > d.getStartXValue(0, 630));
    assertTrue(values[0] < d.getEndXValue(0, 630));        
}
 

/**
 * Some checks for the addSeries() method.
 */
public void testAddSeries() {
    double[] values = {-1.0, 0.0, 0.1, 0.9, 1.0, 1.1, 1.9, 2.0, 3.0};
    HistogramDataset d = new HistogramDataset();
    d.addSeries("S1", values, 2, 0.0, 2.0);
    assertEquals(0.0, d.getStartXValue(0, 0), EPSILON);
    assertEquals(1.0, d.getEndXValue(0, 0), EPSILON);
    assertEquals(4.0, d.getYValue(0, 0), EPSILON);
    
    assertEquals(1.0, d.getStartXValue(0, 1), EPSILON);
    assertEquals(2.0, d.getEndXValue(0, 1), EPSILON);
    assertEquals(5.0, d.getYValue(0, 1), EPSILON);
}
 

/**
 * A test for a bug reported in the forum where the series name isn't being
 * returned correctly.
 */
public void testGetSeriesKey() {
    double[] values = {1.0, 2.0, 3.0, 4.0, 6.0, 12.0, 5.0, 6.3, 4.5};
    HistogramDataset d1 = new HistogramDataset();
    d1.addSeries("Series 1", values, 5);   
    assertEquals("Series 1", d1.getSeriesKey(0));
}
 

/**
 * Confirm that the equals method can distinguish all the required fields.
 */
public void testEquals() {
    
    double[] values = {1.0, 2.0, 3.0, 4.0, 6.0, 12.0, 5.0, 6.3, 4.5};
    HistogramDataset d1 = new HistogramDataset();
    d1.addSeries("Series 1", values, 5);
    HistogramDataset d2 = new HistogramDataset();
    d2.addSeries("Series 1", values, 5);
    
    assertTrue(d1.equals(d2));
    assertTrue(d2.equals(d1));

}
 

/**
 * Some checks that the correct values are assigned to bins.
 */
public void testBins() {
    double[] values = {1.0, 2.0, 3.0, 4.0, 6.0, 12.0, 5.0, 6.3, 4.5};
    HistogramDataset hd = new HistogramDataset();
    hd.addSeries("Series 1", values, 5);
    assertEquals(hd.getYValue(0, 0), 3.0, EPSILON);        
    assertEquals(hd.getYValue(0, 1), 3.0, EPSILON);        
    assertEquals(hd.getYValue(0, 2), 2.0, EPSILON);        
    assertEquals(hd.getYValue(0, 3), 0.0, EPSILON);        
    assertEquals(hd.getYValue(0, 4), 1.0, EPSILON);        
}
 

/**
 * Some checks for bug 1553088.  An IndexOutOfBoundsException is thrown
 * when a data value is *very* close to the upper limit of the last bin.
 */
public void test1553088() {
    double[] values = {-1.0, 0.0, -Double.MIN_VALUE, 3.0};
    HistogramDataset d = new HistogramDataset();
    d.addSeries("S1", values, 2, -1.0, 0.0);
    assertEquals(-1.0, d.getStartXValue(0, 0), EPSILON);
    assertEquals(-0.5, d.getEndXValue(0, 0), EPSILON);
    assertEquals(1.0, d.getYValue(0, 0), EPSILON);

    assertEquals(-0.5, d.getStartXValue(0, 1), EPSILON);
    assertEquals(0.0, d.getEndXValue(0, 1), EPSILON);
    assertEquals(3.0, d.getYValue(0, 1), EPSILON);
}
 

/**
 * This test is derived from a reported bug.
 */
public void testBinBoundaries() {
    double[] values = {-5.000000000000286E-5};
    int bins = 1260;
    double minimum = -0.06307522528160199;
    double maximum = 0.06297522528160199;
    HistogramDataset d = new HistogramDataset();
    d.addSeries("S1", values, bins, minimum, maximum);
    assertEquals(0.0, d.getYValue(0, 629), EPSILON);
    assertEquals(1.0, d.getYValue(0, 630), EPSILON);
    assertEquals(0.0, d.getYValue(0, 631), EPSILON);
    assertTrue(values[0] > d.getStartXValue(0, 630));
    assertTrue(values[0] < d.getEndXValue(0, 630));
}
 

/**
 * Some checks for the addSeries() method.
 */
public void testAddSeries() {
    double[] values = {-1.0, 0.0, 0.1, 0.9, 1.0, 1.1, 1.9, 2.0, 3.0};
    HistogramDataset d = new HistogramDataset();
    d.addSeries("S1", values, 2, 0.0, 2.0);
    assertEquals(0.0, d.getStartXValue(0, 0), EPSILON);
    assertEquals(1.0, d.getEndXValue(0, 0), EPSILON);
    assertEquals(4.0, d.getYValue(0, 0), EPSILON);

    assertEquals(1.0, d.getStartXValue(0, 1), EPSILON);
    assertEquals(2.0, d.getEndXValue(0, 1), EPSILON);
    assertEquals(5.0, d.getYValue(0, 1), EPSILON);
}
 

/**
 * A test for a bug reported in the forum where the series name isn't being
 * returned correctly.
 */
public void testGetSeriesKey() {
    double[] values = {1.0, 2.0, 3.0, 4.0, 6.0, 12.0, 5.0, 6.3, 4.5};
    HistogramDataset d1 = new HistogramDataset();
    d1.addSeries("Series 1", values, 5);
    assertEquals("Series 1", d1.getSeriesKey(0));
}
 

/**
 * Some checks that the correct values are assigned to bins.
 */
public void testBins() {
    double[] values = {1.0, 2.0, 3.0, 4.0, 6.0, 12.0, 5.0, 6.3, 4.5};
    HistogramDataset hd = new HistogramDataset();
    hd.addSeries("Series 1", values, 5);
    assertEquals(hd.getYValue(0, 0), 3.0, EPSILON);
    assertEquals(hd.getYValue(0, 1), 3.0, EPSILON);
    assertEquals(hd.getYValue(0, 2), 2.0, EPSILON);
    assertEquals(hd.getYValue(0, 3), 0.0, EPSILON);
    assertEquals(hd.getYValue(0, 4), 1.0, EPSILON);
}
 

/**
 * Creates a {@link HistogramDataset} for this {@link Attribute}.
 *
 * @param exampleSet
 * @return
 */
private HistogramDataset createHistogramDataset(ExampleSet exampleSet) {
	HistogramDataset dataset = new HistogramDataset();

	double[] array = new double[exampleSet.size()];
	int count = 0;

	for (Example example : exampleSet) {
		double value = example.getDataRow().get(getAttribute());
		// don't use missing values because otherwise JFreeChart tries to plot them too which
		// can lead to false histograms
		if (!Double.isNaN(value)) {
			array[count++] = value;
		}
	}

	// add points to data set (if any)
	if (count > 0) {
		// truncate array if necessary
		if (count < array.length) {
			array = Arrays.copyOf(array, count);
		}
		dataset.addSeries(getAttribute().getName(), array, Math.min(array.length, MAX_BINS_HISTOGRAM));
	}

	return dataset;
}
 

/**
 * Creates a {@link HistogramDataset} for this {@link Attribute}.
 *
 * @param exampleSet
 * @return
 */
private HistogramDataset createHistogramDataset(final ExampleSet exampleSet) {
	HistogramDataset dataset = new HistogramDataset();

	double[] array = new double[exampleSet.size()];
	int count = 0;

	for (Example example : exampleSet) {
		double value = example.getDataRow().get(getAttribute());
		// don't use missing values because otherwise JFreeChart tries to plot them too which
		// can lead to false histograms
		if (!Double.isNaN(value)) {
			array[count++] = value;
		}
	}

	// add points to data set (if any)
	if (count > 0) {
		// truncate array if necessary
		if (count < array.length) {
			array = Arrays.copyOf(array, count);
		}
		dataset.addSeries(getAttribute().getName(), array, Math.min(array.length, MAX_BINS_HISTOGRAM));
	}

	return dataset;
}
 

/**
 * Creates a {@link HistogramDataset} for this column.
 */
private HistogramDataset createHistogramDataset(final Table table) {
	HistogramDataset dataset = new HistogramDataset();

	double[] array = new double[table.height()];
	int count = 0;

	ObjectReader<LocalTime> reader = Readers.objectReader(table.column(getColumnName()),
			LocalTime.class);
	while (reader.hasRemaining()) {
		LocalTime localTime = reader.read();
		// don't use missing values because otherwise JFreeChart tries to plot them too which
		// can lead to false histograms
		if (localTime != null) {
				//charts can plot only as milliseconds since epoch, so convert
			Instant instant = localTime.atDate(EPOCH).atZone(Tools.getPreferredTimeZone().toZoneId()).toInstant();
			array[count++] = instant.getEpochSecond() * SECONDS_TO_MILLIS + instant.getNano() / MILLIS_TO_NANOS;
		}
	}

	// add points to data set (if any)
	if (count > 0) {
		// truncate array if necessary
		if (count < array.length) {
			array = Arrays.copyOf(array, count);
		}
		dataset.addSeries(getColumnName(), array, Math.min(array.length, MAX_BINS_HISTOGRAM));
	}

	return dataset;
}
 

/**
 * Creates a {@link HistogramDataset} for this column.
 */
private HistogramDataset createHistogramDataset(Table table) {
	HistogramDataset dataset = new HistogramDataset();

	double[] array = new double[table.height()];
	int count = 0;

	NumericReader reader = Readers.numericReader(table.column(getColumnName()));
	while(reader.hasRemaining()) {
		double value = reader.read();
		// don't use missing values because otherwise JFreeChart tries to plot them too which
		// can lead to false histograms
		if (!Double.isNaN(value)) {
			array[count++] = value;
		}
	}

	// add points to data set (if any)
	if (count > 0) {
		// truncate array if necessary
		if (count < array.length) {
			array = Arrays.copyOf(array, count);
		}
		dataset.addSeries(getColumnName(), array, Math.min(array.length, MAX_BINS_HISTOGRAM));
	}

	return dataset;
}
 

public void rebuildPanel(Collection<CardFile> currentFiles) {
        removeAll();

        // setup the stacked bar chart
        dataset = new HistogramDataset();
//        dataset.addSeries("test", new double[]{1,2,3},1);
        final JFreeChart chart = ChartFactory.createHistogram(
                null,  // chart title
                Utils.getRB().getString("CardTableModel.stats.weekSchedule"),                  // domain axis label
//                "# cards",                     // range axis label
                null,                     // range axis label
                dataset,                     // data
                PlotOrientation.VERTICAL,    // the plot orientation
                false,                        // legend
                true,                        // tooltips
                false                        // urls
        );

        add(new ChartPanel(chart), BorderLayout.CENTER);
//        rebuildPanel(new HashSet<CardFile>());

        if (currentFiles != null)
            this.currentFiles = currentFiles;

//        dataset.setGroup(null);

        if (this.currentFiles == null)
            return;

        List<Double> eValues = new ArrayList<Double>();

        for (CardFile currentFile : currentFiles) {
            for (Item item : currentFile.getFlashCards().getLTMItems()) {
                LTMItem ltmItem = (LTMItem) item;
                eValues.add(ltmItem.getEFactor());
            }
        }
        double[] eVals = new double[eValues.size()];
        for (int i = 0; i < eValues.size(); i++) {
            eVals[i] = eValues.get(i);

        }


        if (eVals.length > 0)
            dataset.addSeries("test", eVals, 10);

        HistogramDataset dataset1 = new HistogramDataset();
        dataset1.addSeries("test", eVals, 10);

        repaint();

//        computeScheduleHist(this.currentFiles);
//        set2EDistribution(currentFiles);
    }
 

public HistogramDataset getHistogramDataset() {
	return datasetsHistogram;
}