/// <summary>
/// Creates an instance.
/// </summary>
/// <param name="n"> The number of sample points to be used in the integration, not negative or zero </param>
/// <param name="generator"> The generator of weights and abscissas </param>
public GaussianQuadratureIntegrator1D(int n, QuadratureWeightAndAbscissaFunction generator)
{
ArgChecker.isTrue(n > 0, "number of intervals must be > 0");
ArgChecker.notNull(generator, "generating function");
this.size = n;
this.generator = generator;
this.quadrature = generator.generate(size);
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void test()
public virtual void test()
{
const int n = 12;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final GaussianQuadratureData f1 = GAUSS_LEGENDRE.generate(n);
GaussianQuadratureData f1 = GAUSS_LEGENDRE.generate(n);
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final GaussianQuadratureData f2 = GAUSS_JACOBI_GL_EQUIV.generate(n);
GaussianQuadratureData f2 = GAUSS_JACOBI_GL_EQUIV.generate(n);
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final GaussianQuadratureData f3 = GAUSS_JACOBI_CHEBYSHEV_EQUIV.generate(n);
GaussianQuadratureData f3 = GAUSS_JACOBI_CHEBYSHEV_EQUIV.generate(n);
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final double[] w1 = f1.getWeights();
double[] w1 = f1.Weights;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final double[] w2 = f2.getWeights();
double[] w2 = f2.Weights;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final double[] x1 = f1.getAbscissas();
double[] x1 = f1.Abscissas;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final double[] x2 = f2.getAbscissas();
double[] x2 = f2.Abscissas;
assertTrue(w1.Length == w2.Length);
assertTrue(x1.Length == x2.Length);
for (int i = 0; i < n; i++)
{
assertEquals(w1[i], w2[i], EPS);
assertEquals(x1[i], -x2[i], EPS);
}
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final double[] w3 = f3.getWeights();
double[] w3 = f3.Weights;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final double[] x3 = f3.getAbscissas();
double[] x3 = f3.Abscissas;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final double chebyshevWeight = Math.PI / n;
double chebyshevWeight = Math.PI / n;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final java.util.function.Function<int, double> chebyshevAbscissa = new java.util.function.Function<int, double>()
System.Func <int, double> chebyshevAbscissa = (final int?x) =>
{
return(-Math.Cos(Math.PI * (x + 0.5) / n));
};
for (int i = 0; i < n; i++)
{
assertEquals(chebyshevWeight, w3[i], EPS);
assertEquals(chebyshevAbscissa(i), -x3[i], EPS);
}
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void test()
public virtual void test()
{
GaussianQuadratureData other = new GaussianQuadratureData(X, W);
assertEquals(F, other);
assertEquals(F.GetHashCode(), other.GetHashCode());
other = new GaussianQuadratureData(W, W);
assertFalse(F.Equals(other));
other = new GaussianQuadratureData(X, X);
assertFalse(F.Equals(other));
assertArrayEquals(F.Abscissas, X, 0);
assertArrayEquals(F.Weights, W, 0);
}
//JAVA TO C# CONVERTER WARNING: 'final' parameters are not available in .NET:
//ORIGINAL LINE: protected void assertResults(final GaussianQuadratureData f, final double[] x, final double[] w)
protected internal virtual void assertResults(GaussianQuadratureData f, double[] x, double[] w)
{
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final double[] x1 = f.getAbscissas();
double[] x1 = f.Abscissas;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final double[] w1 = f.getWeights();
double[] w1 = f.Weights;
for (int i = 0; i < x.Length; i++)
{
assertEquals(x1[i], x[i], EPS);
assertEquals(w1[i], w[i], EPS);
}
}
public override bool Equals(object obj)
{
if (this == obj)
{
return(true);
}
if (obj == null)
{
return(false);
}
if (this.GetType() != obj.GetType())
{
return(false);
}
GaussianQuadratureData other = (GaussianQuadratureData)obj;
if (!Arrays.Equals(_abscissas, other._abscissas))
{
return(false);
}
return(Arrays.Equals(_weights, other._weights));
}