Examples of org.jfree.data.time.TimeSeries

org.jfree.data.time.TimeSeries
Represents a sequence of zero or more data items in the form (period, value) where 'period' is some instance of a subclass of {@link RegularTimePeriod}. The time series will ensure that (a) all data items have the same type of period (for example, {@link Day}) and (b) that each period appears at most one time in the series.

     * Serialize a time seroes chart, restore it, and check for equality.
     */
    public void testSerialization4() {


        RegularTimePeriod t = new Day();
        TimeSeries series = new TimeSeries("Series 1");
        series.add(t, 36.4);
        t = t.next();
        series.add(t, 63.5);
        TimeSeriesCollection dataset = new TimeSeriesCollection();
        dataset.addSeries(series);


        JFreeChart c1 = ChartFactory.createTimeSeriesChart("Test", "Date",
                "Value", dataset, true, true, true);

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     * @return The dataset.
     */
    private static XYDataset createDataset(String name, double base,
                                           RegularTimePeriod start, int count) {


        TimeSeries series = new TimeSeries(name);
        RegularTimePeriod period = start;
        double value = base;
        for (int i = 0; i < count; i++) {
            series.add(period, value);
            period = period.next();
            value = value * (1 + (Math.random() - 0.495) / 10.0);
        }


        TimeSeriesCollection dataset = new TimeSeriesCollection();

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     *
     * @return The dataset.
     */
    private static XYDataset createDataset() {


        TimeSeries s1 = new TimeSeries("L&G European Index Trust");
        s1.add(new Month(2, 2001), 181.8);
        s1.add(new Month(3, 2001), 167.3);
        s1.add(new Month(4, 2001), 153.8);
        s1.add(new Month(5, 2001), 167.6);
        s1.add(new Month(6, 2001), 158.8);
        s1.add(new Month(7, 2001), 148.3);
        s1.add(new Month(8, 2001), 153.9);
        s1.add(new Month(9, 2001), 142.7);
        s1.add(new Month(10, 2001), 123.2);
        s1.add(new Month(11, 2001), 131.8);
        s1.add(new Month(12, 2001), 139.6);
        s1.add(new Month(1, 2002), 142.9);
        s1.add(new Month(2, 2002), 138.7);
        s1.add(new Month(3, 2002), 137.3);
        s1.add(new Month(4, 2002), 143.9);
        s1.add(new Month(5, 2002), 139.8);
        s1.add(new Month(6, 2002), 137.0);
        s1.add(new Month(7, 2002), 132.8);


        TimeSeries s2 = new TimeSeries("L&G UK Index Trust");
        s2.add(new Month(2, 2001), 129.6);
        s2.add(new Month(3, 2001), 123.2);
        s2.add(new Month(4, 2001), 117.2);
        s2.add(new Month(5, 2001), 124.1);
        s2.add(new Month(6, 2001), 122.6);
        s2.add(new Month(7, 2001), 119.2);
        s2.add(new Month(8, 2001), 116.5);
        s2.add(new Month(9, 2001), 112.7);
        s2.add(new Month(10, 2001), 101.5);
        s2.add(new Month(11, 2001), 106.1);
        s2.add(new Month(12, 2001), 110.3);
        s2.add(new Month(1, 2002), 111.7);
        s2.add(new Month(2, 2002), 111.0);
        s2.add(new Month(3, 2002), 109.6);
        s2.add(new Month(4, 2002), 113.2);
        s2.add(new Month(5, 2002), 111.6);
        s2.add(new Month(6, 2002), 108.8);
        s2.add(new Month(7, 2002), 101.6);
        
        TimeSeriesCollection dataset = new TimeSeriesCollection();
        dataset.addSeries(s1);
        dataset.addSeries(s2);

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    /**
     * Another test of the clone() method.
     */
    public void testClone2() {
        TimeSeries s1 = new TimeSeries("S1", Year.class);
        s1.add(new Year(2007), 100.0);
        s1.add(new Year(2008), null);
        s1.add(new Year(2009), 200.0);
        TimeSeries s2 = null;
        try {
            s2 = (TimeSeries) s1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(s1.equals(s2));


        // check independence
        s2.addOrUpdate(new Year(2009), 300.0);
        assertFalse(s1.equals(s2));
        s1.addOrUpdate(new Year(2009), 300.0);
        assertTrue(s1.equals(s2));
    }

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    /**
     * Basic tests for the delete() method.
     */
    public void testDelete2() {
        TimeSeries s1 = new TimeSeries("Series", Year.class);
        s1.add(new Year(2000), 13.75);
        s1.add(new Year(2001), 11.90);
        s1.add(new Year(2002), null);
        s1.addChangeListener(this);
        this.gotSeriesChangeEvent = false;
        s1.delete(new Year(2001));
        assertTrue(this.gotSeriesChangeEvent);
        assertEquals(2, s1.getItemCount());
        assertEquals(null, s1.getValue(new Year(2001)));


        // try deleting a time period that doesn't exist...
        this.gotSeriesChangeEvent = false;
        s1.delete(new Year(2006));
        assertFalse(this.gotSeriesChangeEvent);


        // try deleting null
        try {
            s1.delete(null);
            fail("Expected IllegalArgumentException.");
        }
        catch (IllegalArgumentException e) {
            // expected
        }

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    /**
     * Some checks for the delete(int, int) method.
     */
    public void testDelete3() {
        TimeSeries s1 = new TimeSeries("S1");
        s1.add(new Year(2011), 1.1);
        s1.add(new Year(2012), 2.2);
        s1.add(new Year(2013), 3.3);
        s1.add(new Year(2014), 4.4);
        s1.add(new Year(2015), 5.5);
        s1.add(new Year(2016), 6.6);
        s1.delete(2, 5);
        assertEquals(2, s1.getItemCount());
        assertEquals(new Year(2011), s1.getTimePeriod(0));
        assertEquals(new Year(2012), s1.getTimePeriod(1));
        assertEquals(1.1, s1.getMinY(), EPSILON);
        assertEquals(2.2, s1.getMaxY(), EPSILON);
    }

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    /**
     * Check that the item bounds are determined correctly when there is a
     * maximum item count and a new value is added.
     */
    public void testDelete_RegularTimePeriod() {
        TimeSeries s1 = new TimeSeries("S1");
        s1.add(new Year(2010), 1.1);
        s1.add(new Year(2011), 2.2);
        s1.add(new Year(2012), 3.3);
        s1.add(new Year(2013), 4.4);
        s1.delete(new Year(2010));
        s1.delete(new Year(2013));
        assertEquals(2.2, s1.getMinY(), EPSILON);
        assertEquals(3.3, s1.getMaxY(), EPSILON);
    }

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    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {
        TimeSeries s1 = new TimeSeries("A test");
        s1.add(new Year(2000), 13.75);
        s1.add(new Year(2001), 11.90);
        s1.add(new Year(2002), null);
        s1.add(new Year(2005), 19.32);
        s1.add(new Year(2007), 16.89);
        TimeSeries s2 = null;
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(s1);
            out.close();

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    /**
     * Tests the equals method.
     */
    public void testEquals() {
        TimeSeries s1 = new TimeSeries("Time Series 1");
        TimeSeries s2 = new TimeSeries("Time Series 2");
        boolean b1 = s1.equals(s2);
        assertFalse("b1", b1);


        s2.setKey("Time Series 1");
        boolean b2 = s1.equals(s2);
        assertTrue("b2", b2);


        RegularTimePeriod p1 = new Day();
        RegularTimePeriod p2 = p1.next();
        s1.add(p1, 100.0);
        s1.add(p2, 200.0);
        boolean b3 = s1.equals(s2);
        assertFalse("b3", b3);


        s2.add(p1, 100.0);
        s2.add(p2, 200.0);
        boolean b4 = s1.equals(s2);
        assertTrue("b4", b4);


        s1.setMaximumItemCount(100);
        boolean b5 = s1.equals(s2);
        assertFalse("b5", b5);


        s2.setMaximumItemCount(100);
        boolean b6 = s1.equals(s2);
        assertTrue("b6", b6);


        s1.setMaximumItemAge(100);
        boolean b7 = s1.equals(s2);
        assertFalse("b7", b7);


        s2.setMaximumItemAge(100);
        boolean b8 = s1.equals(s2);
        assertTrue("b8", b8);
    }

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    /**
     * Tests a specific bug report where null arguments in the constructor
     * cause the equals() method to fail.  Fixed for 0.9.21.
     */
    public void testEquals2() {
        TimeSeries s1 = new TimeSeries("Series", null, null, Day.class);
        TimeSeries s2 = new TimeSeries("Series", null, null, Day.class);
        assertTrue(s1.equals(s2));
    }

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