Package org.apache.commons.math3.fraction

Examples of org.apache.commons.math3.fraction.Fraction

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    @Test
    public void testWalkInOptimizedOrderChangingVisitor1() {
        final Fraction[] data = new Fraction[] {
            Fraction.ZERO, Fraction.ONE, Fraction.ZERO,
            Fraction.ZERO, Fraction.TWO, Fraction.ZERO,
            Fraction.ZERO, Fraction.ZERO, new Fraction(3)
        };
        final SparseFieldVector<Fraction> v = new SparseFieldVector<Fraction>(field, data);
        final FieldVectorChangingVisitor<Fraction> visitor;
        visitor = new FieldVectorChangingVisitor<Fraction>() {
            private final boolean[] visited = new boolean[data.length];
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    @Test
    public void testWalkInOptimizedOrderChangingVisitor3() {
        final Fraction[] data = new Fraction[] {
            Fraction.ZERO, Fraction.ONE, Fraction.ZERO,
            Fraction.ZERO, Fraction.TWO, Fraction.ZERO,
            Fraction.ZERO, Fraction.ZERO, new Fraction(3)
        };
        final SparseFieldVector<Fraction> v = new SparseFieldVector<Fraction>(field, data);
        final int expectedStart = 2;
        final int expectedEnd = 7;
        final FieldVectorChangingVisitor<Fraction> visitor;
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    private Map<Integer, Fraction> javaMap = new HashMap<Integer, Fraction>();
    private FractionField field = FractionField.getInstance();

    @Before
    public void setUp() throws FractionConversionException {
        javaMap.put(50, new Fraction(100.0));
        javaMap.put(75, new Fraction(75.0));
        javaMap.put(25, new Fraction(500.0));
        javaMap.put(Integer.MAX_VALUE, new Fraction(Integer.MAX_VALUE));
        javaMap.put(0, new Fraction(-1.0));
        javaMap.put(1, new Fraction(0.0));
        javaMap.put(33, new Fraction(-0.1));
        javaMap.put(23234234, new Fraction(-242343.0));
        javaMap.put(23321, new Fraction (Integer.MIN_VALUE));
        javaMap.put(-4444, new Fraction(332.0));
        javaMap.put(-1, new Fraction(-2323.0));
        javaMap.put(Integer.MIN_VALUE, new Fraction(44.0));

        /* Add a few more to cause the table to rehash */
        javaMap.putAll(generate());

    }
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        Random r = new Random();
        double dd=0;
        for (int i = 0; i < 2000; ++i)
            dd = r.nextDouble();
            try {
                map.put(r.nextInt(), new Fraction(dd));
            } catch (FractionConversionException e) {
                throw new IllegalStateException("Invalid :"+dd, e);
            }
        return map;
    }
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    @Test
    public void testConcurrentModification() {
        OpenIntToFieldHashMap<Fraction> map = createFromJavaMap(field);
        OpenIntToFieldHashMap<Fraction>.Iterator iterator = map.iterator();
        map.put(3, new Fraction(3));
        try {
            iterator.advance();
            Assert.fail("an exception should have been thrown");
        } catch (ConcurrentModificationException cme) {
            // expected
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     */
    @Test
    public void testPutKeysWithCollisions() {
        OpenIntToFieldHashMap<Fraction> map = new OpenIntToFieldHashMap<Fraction>(field);
        int key1 = -1996012590;
        Fraction value1 = new Fraction(1);
        map.put(key1, value1);
        int key2 = 835099822;
        map.put(key2, value1);
        int key3 = 1008859686;
        map.put(key3, value1);
        Assert.assertEquals(value1, map.get(key3));
        Assert.assertEquals(3, map.size());

        map.remove(key2);
        Fraction value2 = new Fraction(2);
        map.put(key3, value2);
        Assert.assertEquals(value2, map.get(key3));
        Assert.assertEquals(2, map.size());
    }
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     */
    @Test
    public void testPutKeysWithCollision2() {
        OpenIntToFieldHashMap<Fraction>map = new OpenIntToFieldHashMap<Fraction>(field);
        int key1 = 837989881;
        Fraction value1 = new Fraction(1);
        map.put(key1, value1);
        int key2 = 476463321;
        map.put(key2, value1);
        Assert.assertEquals(2, map.size());
        Assert.assertEquals(value1, map.get(key2));

        map.remove(key1);
        Fraction value2 = new Fraction(2);
        map.put(key2, value2);
        Assert.assertEquals(1, map.size());
        Assert.assertEquals(value2, map.get(key2));
    }
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        ArrayFieldVector<Fraction> v1 = new ArrayFieldVector<Fraction>(FractionField.getInstance(), 7);
        Assert.assertEquals(7, v1.getDimension());
        Assert.assertEquals(Fraction.ZERO, v1.getEntry(6));

        ArrayFieldVector<Fraction> v2 = new ArrayFieldVector<Fraction>(5, new Fraction(123, 100));
        Assert.assertEquals(5, v2.getDimension());
        Assert.assertEquals(new Fraction(123, 100), v2.getEntry(4));

        ArrayFieldVector<Fraction> v3 = new ArrayFieldVector<Fraction>(FractionField.getInstance(), vec1);
        Assert.assertEquals(3, v3.getDimension());
        Assert.assertEquals(new Fraction(2), v3.getEntry(1));

        ArrayFieldVector<Fraction> v4 = new ArrayFieldVector<Fraction>(FractionField.getInstance(), vec4, 3, 2);
        Assert.assertEquals(2, v4.getDimension());
        Assert.assertEquals(new Fraction(4), v4.getEntry(0));
        try {
            new ArrayFieldVector<Fraction>(vec4, 8, 3);
            Assert.fail("MathIllegalArgumentException expected");
        } catch (MathIllegalArgumentException ex) {
            // expected behavior
        }

        FieldVector<Fraction> v5_i = new ArrayFieldVector<Fraction>(dvec1);
        Assert.assertEquals(9, v5_i.getDimension());
        Assert.assertEquals(new Fraction(9), v5_i.getEntry(8));

        ArrayFieldVector<Fraction> v5 = new ArrayFieldVector<Fraction>(dvec1);
        Assert.assertEquals(9, v5.getDimension());
        Assert.assertEquals(new Fraction(9), v5.getEntry(8));

        ArrayFieldVector<Fraction> v6 = new ArrayFieldVector<Fraction>(dvec1, 3, 2);
        Assert.assertEquals(2, v6.getDimension());
        Assert.assertEquals(new Fraction(4), v6.getEntry(0));
        try {
            new ArrayFieldVector<Fraction>(dvec1, 8, 3);
            Assert.fail("MathIllegalArgumentException expected");
        } catch (MathIllegalArgumentException ex) {
            // expected behavior
        }

        ArrayFieldVector<Fraction> v7 = new ArrayFieldVector<Fraction>(v1);
        Assert.assertEquals(7, v7.getDimension());
        Assert.assertEquals(Fraction.ZERO, v7.getEntry(6));

        FieldVectorTestImpl<Fraction> v7_i = new FieldVectorTestImpl<Fraction>(vec1);

        ArrayFieldVector<Fraction> v7_2 = new ArrayFieldVector<Fraction>(v7_i);
        Assert.assertEquals(3, v7_2.getDimension());
        Assert.assertEquals(new Fraction(2), v7_2.getEntry(1));

        ArrayFieldVector<Fraction> v8 = new ArrayFieldVector<Fraction>(v1, true);
        Assert.assertEquals(7, v8.getDimension());
        Assert.assertEquals(Fraction.ZERO, v8.getEntry(6));
        Assert.assertNotSame("testData not same object ", v1.getDataRef(), v8.getDataRef());

        ArrayFieldVector<Fraction> v8_2 = new ArrayFieldVector<Fraction>(v1, false);
        Assert.assertEquals(7, v8_2.getDimension());
        Assert.assertEquals(Fraction.ZERO, v8_2.getEntry(6));
        Assert.assertArrayEquals(v1.getDataRef(), v8_2.getDataRef());

        ArrayFieldVector<Fraction> v9 = new ArrayFieldVector<Fraction>((FieldVector<Fraction>) v1, (FieldVector<Fraction>) v3);
        Assert.assertEquals(10, v9.getDimension());
        Assert.assertEquals(new Fraction(1), v9.getEntry(7));

    }
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        ArrayFieldVector<Fraction> v4 = new ArrayFieldVector<Fraction>(vec4);
        FieldVectorTestImpl<Fraction> v2_t = new FieldVectorTestImpl<Fraction>(vec2);

        FieldVector<Fraction> v_append_1 = v1.append(v2);
        Assert.assertEquals(6, v_append_1.getDimension());
        Assert.assertEquals(new Fraction(4), v_append_1.getEntry(3));

        FieldVector<Fraction> v_append_2 = v1.append(new Fraction(2));
        Assert.assertEquals(4, v_append_2.getDimension());
        Assert.assertEquals(new Fraction(2), v_append_2.getEntry(3));

        FieldVector<Fraction> v_append_4 = v1.append(v2_t);
        Assert.assertEquals(6, v_append_4.getDimension());
        Assert.assertEquals(new Fraction(4), v_append_4.getEntry(3));

        FieldVector<Fraction> v_copy = v1.copy();
        Assert.assertEquals(3, v_copy.getDimension());
        Assert.assertNotSame("testData not same object ", v1.getDataRef(), v_copy.toArray());

        Fraction[] a_frac = v1.toArray();
        Assert.assertEquals(3, a_frac.length);
        Assert.assertNotSame("testData not same object ", v1.getDataRef(), a_frac);


//      ArrayFieldVector<Fraction> vout4 = (ArrayFieldVector<Fraction>) v1.clone();
//      Assert.assertEquals(3, vout4.getDimension());
//      Assert.assertEquals(v1.getDataRef(), vout4.getDataRef());


        FieldVector<Fraction> vout5 = v4.getSubVector(3, 3);
        Assert.assertEquals(3, vout5.getDimension());
        Assert.assertEquals(new Fraction(5), vout5.getEntry(1));
        try {
            v4.getSubVector(3, 7);
            Assert.fail("OutOfRangeException expected");
        } catch (OutOfRangeException ex) {
            // expected behavior
        }

        ArrayFieldVector<Fraction> v_set1 = (ArrayFieldVector<Fraction>) v1.copy();
        v_set1.setEntry(1, new Fraction(11));
        Assert.assertEquals(new Fraction(11), v_set1.getEntry(1));
        try {
            v_set1.setEntry(3, new Fraction(11));
            Assert.fail("OutOfRangeException expected");
        } catch (OutOfRangeException ex) {
            // expected behavior
        }

        ArrayFieldVector<Fraction> v_set2 = (ArrayFieldVector<Fraction>) v4.copy();
        v_set2.set(3, v1);
        Assert.assertEquals(new Fraction(1), v_set2.getEntry(3));
        Assert.assertEquals(new Fraction(7), v_set2.getEntry(6));
        try {
            v_set2.set(7, v1);
            Assert.fail("OutOfRangeException expected");
        } catch (OutOfRangeException ex) {
            // expected behavior
        }

        ArrayFieldVector<Fraction> v_set3 = (ArrayFieldVector<Fraction>) v1.copy();
        v_set3.set(new Fraction(13));
        Assert.assertEquals(new Fraction(13), v_set3.getEntry(2));

        try {
            v_set3.getEntry(23);
            Assert.fail("ArrayIndexOutOfBoundsException expected");
        } catch (ArrayIndexOutOfBoundsException ex) {
            // expected behavior
        }

        ArrayFieldVector<Fraction> v_set4 = (ArrayFieldVector<Fraction>) v4.copy();
        v_set4.setSubVector(3, v2_t);
        Assert.assertEquals(new Fraction(4), v_set4.getEntry(3));
        Assert.assertEquals(new Fraction(7), v_set4.getEntry(6));
        try {
            v_set4.setSubVector(7, v2_t);
            Assert.fail("OutOfRangeException expected");
        } catch (OutOfRangeException ex) {
            // expected behavior
        }


        ArrayFieldVector<Fraction> vout10 = (ArrayFieldVector<Fraction>) v1.copy();
        ArrayFieldVector<Fraction> vout10_2 = (ArrayFieldVector<Fraction>) v1.copy();
        Assert.assertEquals(vout10, vout10_2);
        vout10_2.setEntry(0, new Fraction(11, 10));
        Assert.assertNotSame(vout10, vout10_2);

    }
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    @Test
    public void testMapFunctions() {
        ArrayFieldVector<Fraction> v1 = new ArrayFieldVector<Fraction>(vec1);

        //octave =  v1 .+ 2.0
        FieldVector<Fraction> v_mapAdd = v1.mapAdd(new Fraction(2));
        Fraction[] result_mapAdd = {new Fraction(3), new Fraction(4), new Fraction(5)};
        checkArray("compare vectors" ,result_mapAdd,v_mapAdd.toArray());

        //octave =  v1 .+ 2.0
        FieldVector<Fraction> v_mapAddToSelf = v1.copy();
        v_mapAddToSelf.mapAddToSelf(new Fraction(2));
        Fraction[] result_mapAddToSelf = {new Fraction(3), new Fraction(4), new Fraction(5)};
        checkArray("compare vectors" ,result_mapAddToSelf,v_mapAddToSelf.toArray());

        //octave =  v1 .- 2.0
        FieldVector<Fraction> v_mapSubtract = v1.mapSubtract(new Fraction(2));
        Fraction[] result_mapSubtract = {new Fraction(-1), Fraction.ZERO, new Fraction(1)};
        checkArray("compare vectors" ,result_mapSubtract,v_mapSubtract.toArray());

        //octave =  v1 .- 2.0
        FieldVector<Fraction> v_mapSubtractToSelf = v1.copy();
        v_mapSubtractToSelf.mapSubtractToSelf(new Fraction(2));
        Fraction[] result_mapSubtractToSelf = {new Fraction(-1), Fraction.ZERO, new Fraction(1)};
        checkArray("compare vectors" ,result_mapSubtractToSelf,v_mapSubtractToSelf.toArray());

        //octave =  v1 .* 2.0
        FieldVector<Fraction> v_mapMultiply = v1.mapMultiply(new Fraction(2));
        Fraction[] result_mapMultiply = {new Fraction(2), new Fraction(4), new Fraction(6)};
        checkArray("compare vectors" ,result_mapMultiply,v_mapMultiply.toArray());

        //octave =  v1 .* 2.0
        FieldVector<Fraction> v_mapMultiplyToSelf = v1.copy();
        v_mapMultiplyToSelf.mapMultiplyToSelf(new Fraction(2));
        Fraction[] result_mapMultiplyToSelf = {new Fraction(2), new Fraction(4), new Fraction(6)};
        checkArray("compare vectors" ,result_mapMultiplyToSelf,v_mapMultiplyToSelf.toArray());

        //octave =  v1 ./ 2.0
        FieldVector<Fraction> v_mapDivide = v1.mapDivide(new Fraction(2));
        Fraction[] result_mapDivide = {new Fraction(1, 2), new Fraction(1), new Fraction(3, 2)};
        checkArray("compare vectors" ,result_mapDivide,v_mapDivide.toArray());

        //octave =  v1 ./ 2.0
        FieldVector<Fraction> v_mapDivideToSelf = v1.copy();
        v_mapDivideToSelf.mapDivideToSelf(new Fraction(2));
        Fraction[] result_mapDivideToSelf = {new Fraction(1, 2), new Fraction(1), new Fraction(3, 2)};
        checkArray("compare vectors" ,result_mapDivideToSelf,v_mapDivideToSelf.toArray());

        //octave =  v1 .^-1
        FieldVector<Fraction> v_mapInv = v1.mapInv();
        Fraction[] result_mapInv = {new Fraction(1),new Fraction(1, 2),new Fraction(1, 3)};
        checkArray("compare vectors" ,result_mapInv,v_mapInv.toArray());

        //octave =  v1 .^-1
        FieldVector<Fraction> v_mapInvToSelf = v1.copy();
        v_mapInvToSelf.mapInvToSelf();
        Fraction[] result_mapInvToSelf = {new Fraction(1),new Fraction(1, 2),new Fraction(1, 3)};
        checkArray("compare vectors" ,result_mapInvToSelf,v_mapInvToSelf.toArray());

    }
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Related Classes of org.apache.commons.math3.fraction.Fraction

  • fraction.FractionTest
  • org.apache.commons.math3.analysis.differentiation.DerivativeStructure
  • org.apache.commons.math3.analysis.differentiation.MultivariateDifferentiableVectorFunction
  • org.apache.commons.math3.analysis.function.HarmonicOscillator
  • org.apache.commons.math3.analysis.function.Sin
  • org.apache.commons.math3.analysis.function.Sinc
  • org.apache.commons.math3.analysis.MultivariateFunction
  • org.apache.commons.math3.analysis.QuinticFunction
  • org.apache.commons.math3.analysis.solvers.BrentSolver
  • org.apache.commons.math3.analysis.UnivariateFunction
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