Accord.Tests.Statistics.SimpleLinearRegressionTest.ToStringTest C# (CSharp) Method

        public void ToStringTest()
        {
            // Issue 51:
            SimpleLinearRegression regression = new SimpleLinearRegression();
            var x = new double[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
            var y = new double[] { 1, 6, 17, 34, 57, 86, 121, 162, 209, 262, 321 };

            regression.Regress(x, y);

            {
                string expected = "y(x) = 32x + -44";
                expected = expected.Replace(".", System.Globalization.CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator);
                string actual = regression.ToString();
                Assert.AreEqual(expected, actual);
            }

            {
                string expected = "y(x) = 32x + -44";
                string actual = regression.ToString(null, System.Globalization.CultureInfo.GetCultureInfo("en-US"));
                Assert.AreEqual(expected, actual);
            }

            {
                string expected = "y(x) = 32.0x + -44.0";
                string actual = regression.ToString("N1", System.Globalization.CultureInfo.GetCultureInfo("en-US"));
                Assert.AreEqual(expected, actual);
            }

            {
                string expected = "y(x) = 32,00x + -44,00";
                string actual = regression.ToString("N2", System.Globalization.CultureInfo.GetCultureInfo("pt-BR"));
                Assert.AreEqual(expected, actual);
            }
        }
    }