public void FitTest1()
{
double[] values =
{
0, 1, 2, 4, 2, 3, 5, 7, 4, 3, 2, 1, 4,
};
var exp = new ExponentialDistribution();
exp.Fit(values);
string actual;
var cultureInfo = CultureInfo.GetCultureInfo("fr-FR");
#if NETCORE
System.Globalization.CultureInfo.DefaultThreadCurrentCulture = cultureInfo;
System.Globalization.CultureInfo.DefaultThreadCurrentUICulture = cultureInfo;
#else
Thread.CurrentThread.CurrentCulture = cultureInfo;
#endif
actual = exp.ToString("G3", CultureInfo.InvariantCulture);
Assert.AreEqual("Exp(x; λ = 0.342)", actual);
actual = exp.ToString("G3");
Assert.AreEqual("Exp(x; λ = 0,342)", actual);
actual = exp.ToString(CultureInfo.InvariantCulture);
Assert.AreEqual("Exp(x; λ = 0.342105263157895)", actual);
actual = exp.ToString();
Assert.AreEqual("Exp(x; λ = 0,342105263157895)", actual);
}
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(".", CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator);
string actual = regression.ToString();
Assert.AreEqual(expected, actual);
}
{
string expected = "y(x) = 32x + -44";
string actual = regression.ToString(null, CultureInfo.GetCultureInfo("en-US"));
Assert.AreEqual(expected, actual);
}
{
string expected = "y(x) = 32.0x + -44.0";
string actual = regression.ToString("N1", CultureInfo.GetCultureInfo("en-US"));
Assert.AreEqual(expected, actual);
}
{
string expected = "y(x) = 32,00x + -44,00";
string actual = regression.ToString("N2", CultureInfo.GetCultureInfo("pt-BR"));
Assert.AreEqual(expected, actual);
}
}
public void RegressTest6()
{
MultipleLinearRegression target = new MultipleLinearRegression(2, false);
double[][] inputs =
{
new double[] { 0, 0 },
new double[] { 0, 0 },
new double[] { 0, 0 },
new double[] { 0, 0 },
new double[] { 0, 0 },
};
double[] outputs = { 20, 40, 30, 50, 60 };
double error = target.Regress(inputs, outputs);
double slope = target.Coefficients[0];
double intercept = target.Coefficients[1];
Assert.AreEqual(0, slope, 1e-5);
Assert.AreEqual(0, intercept, 1e-5);
Assert.AreEqual(9000, error);
double r = target.CoefficientOfDetermination(inputs, outputs);
Assert.AreEqual(-8, r, 1e-6);
string str = target.ToString(null, CultureInfo.GetCultureInfo("pt-BR"));
Assert.AreEqual("y(x0, x1) = 0*x0 + 0*x1", str);
}
public void ToStringTest()
{
// Issue 51:
PolynomialRegression poly = new PolynomialRegression(2);
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 };
poly.Regress(x, y);
{
string expected = "y(x) = 3x^2 + 1.99999999999998x^1 + 1.00000000000005";
expected = expected.Replace(".", CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator);
string actual = poly.ToString();
Assert.AreEqual(expected, actual);
}
{
string expected = "y(x) = 3x^2 + 1.99999999999998x^1 + 1.00000000000005";
string actual = poly.ToString(null, CultureInfo.GetCultureInfo("en-US"));
Assert.AreEqual(expected, actual);
}
{
string expected = "y(x) = 3.0x^2 + 2.0x^1 + 1.0";
string actual = poly.ToString("N1", CultureInfo.GetCultureInfo("en-US"));
Assert.AreEqual(expected, actual);
}
{
string expected = "y(x) = 3,00x^2 + 2,00x^1 + 1,00";
string actual = poly.ToString("N2", CultureInfo.GetCultureInfo("pt-BR"));
Assert.AreEqual(expected, actual);
}
}
public void RegressTest2()
{
var target = new MultipleLinearRegression(2, false);
Assert.IsFalse(target.HasIntercept);
double[][] inputs =
{
new double[] { 80, 1 },
new double[] { 60, 1 },
new double[] { 10, 1 },
new double[] { 20, 1 },
new double[] { 30, 1 },
};
double[] outputs = { 20, 40, 30, 50, 60 };
double error = target.Regress(inputs, outputs);
Assert.AreEqual(2, target.NumberOfInputs);
Assert.AreEqual(1, target.NumberOfOutputs);
double slope = target.Coefficients[0];
double intercept = target.Coefficients[1];
Assert.AreEqual(-0.264706, slope, 1e-5);
Assert.AreEqual(50.588235, intercept, 1e-5);
Assert.AreEqual(761.764705, error, 1e-5);
double r = target.CoefficientOfDetermination(inputs, outputs);
Assert.AreEqual(0.23823529, r, 1e-6);
string str = target.ToString(null, CultureInfo.GetCultureInfo("en-US"));
Assert.AreEqual("y(x0, x1) = -0.264705882352941*x0 + 50.5882352941176*x1", str);
}
public void RegressTest()
{
MultipleLinearRegression target = new MultipleLinearRegression(1, true);
double[][] inputs =
{
new double[] { 80 },
new double[] { 60 },
new double[] { 10 },
new double[] { 20 },
new double[] { 30 },
};
double[] outputs = { 20, 40, 30, 50, 60 };
double error = target.Regress(inputs, outputs);
Assert.AreEqual(1, target.NumberOfInputs);
Assert.AreEqual(1, target.NumberOfOutputs);
double slope = target.Coefficients[0];
double intercept = target.Coefficients[1];
Assert.AreEqual(-0.264706, slope, 1e-5);
Assert.AreEqual(50.588235, intercept, 1e-5);
Assert.AreEqual(761.764705, error, 1e-5);
double r = target.CoefficientOfDetermination(inputs, outputs);
Assert.AreEqual(0.23823529, r, 1e-6);
string str = target.ToString(null, CultureInfo.GetCultureInfo("pt-BR"));
Assert.AreEqual("y(x0) = -0,264705882352941*x0 + 50,5882352941176", str);
}
