public void TestException()
        {
            var fn = new InverseLinkFunction();

            double[] x = { 1, 2 };
            fn.Evaluate(x);
        }
        public void TestEvaluate()
        {
            var fn = new InverseLinkFunction();

            double[] x = { 2 };
            double   y = fn.Evaluate(x);

            Assert.AreEqual(-0.5, y, AIFH.DefaultPrecision);
        }