/// <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);
}