Inverse() public method

The Sin mean (activation) function.
public Inverse ( double x ) : double
x double A transformed value.
return double
SinLinkFunction Class Documentation
Example #1
0
        public void DerivativeTest()
        {
            double[] expected =
            {
                0.5, 0.497502, 0.490033, 0.477668, 0.46053, 0.438791,
                0.412668, 0.382421, 0.348353, 0.310805, 0.270151
            };

            SinLinkFunction target = new SinLinkFunction();

            for (int i = 0; i < 11; i++)
            {
                double x = i / 10.0;
                double y = target.Inverse(x);

                double d1 = target.Derivative(x);
                double d2 = target.Derivative2(y);

                Assert.AreEqual(expected[i], d1, 1e-6);
                Assert.AreEqual(expected[i], d2, 1e-6);

                Assert.IsFalse(Double.IsNaN(d1));
                Assert.IsFalse(Double.IsNaN(d2));
            }
        }
Example #2
0
        public void SinLinkFunctionConstructorTest()
        {
            SinLinkFunction target = new SinLinkFunction();
            Assert.AreEqual(-1, target.A);
            Assert.AreEqual(2, target.B);

            for (int i = 0; i < 11; i++)
            {
                double x = i / 10.0;
                double y = (Math.Sin(x) + 1) / 2.0;

                Assert.AreEqual(y, target.Function(x), 1e-10);
                Assert.AreEqual(x, target.Inverse(y), 1e-10);
            }
        }