Examples of Inverse

Examples of org.apache.commons.math3.analysis.function.Inverse

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    @Test
    public void testMultiply() {
        UnivariateFunction c = new Constant(4);
        Assert.assertEquals(16, FunctionUtils.multiply(c, c).value(12345), EPS);

        UnivariateFunction inv = new Inverse();
        UnivariateFunction pow = new Power(2);
        Assert.assertEquals(1, FunctionUtils.multiply(FunctionUtils.compose(inv, pow), pow).value(3.5), EPS);
    }
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Examples of org.apache.commons.math3.analysis.function.Inverse

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        DifferentiableUnivariateFunction c = new Constant(4);
        DifferentiableUnivariateFunction id = new Identity();
        final double a = 1.2345678;
        Assert.assertEquals(8 * a, FunctionUtils.multiply(c, id, id).derivative().value(a), EPS);

        DifferentiableUnivariateFunction inv = new Inverse();
        DifferentiableUnivariateFunction pow = new Power(2.5);
        DifferentiableUnivariateFunction cos = new Cos();
        Assert.assertEquals(1.5 * Math.sqrt(a) * Math.cos(a) - Math.pow(a, 1.5) * Math.sin(a),
                            FunctionUtils.multiply(inv, pow, cos).derivative().value(a), EPS);

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Examples of org.apache.commons.math3.analysis.function.Inverse

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        UnivariateFunction m = new Minus();
        UnivariateFunction c = FunctionUtils.combine(bi, id, m);
        Assert.assertEquals(0, c.value(2.3456), EPS);

        bi = new Multiply();
        UnivariateFunction inv = new Inverse();
        c = FunctionUtils.combine(bi, id, inv);
        Assert.assertEquals(1, c.value(2.3456), EPS);
    }
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