public static void pn_polynomial_value_test()
//****************************************************************************80
//
// Purpose:
//
// PN_POLYNOMIAL_VALUE_TEST tests PN_POLYNOMIAL_VALUE.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 18 March 2012
//
// Author:
//
// John Burkardt
//
{
double fx1 = 0;
int n = 0;
double x = 0;
double[] x_vec = new double[1];
Console.WriteLine("");
Console.WriteLine("PN_POLYNOMIAL_VALUE_TEST:");
Console.WriteLine(" PN_POLYNOMIAL_VALUE evaluates the normalized Legendre polynomial Pn(n,x).");
Console.WriteLine("");
Console.WriteLine(" Tabulated Computed");
Console.WriteLine(" N X Pn(N,X) Pn(N,X) Error");
Console.WriteLine("");
int n_data = 0;
for (;;)
{
Burkardt.Values.Legendre.pn_polynomial_values(ref n_data, ref n, ref x, ref fx1);
if (n_data == 0)
{
break;
}
x_vec[0] = x;
double[] fx2_vec = Legendre.pn_polynomial_value(1, n, x_vec);
double fx2 = fx2_vec[n];
double e = fx1 - fx2;
Console.WriteLine(" " + n.ToString(CultureInfo.InvariantCulture).PadLeft(4)
+ " " + x.ToString(CultureInfo.InvariantCulture).PadLeft(12)
+ " " + fx1.ToString("0.################").PadLeft(24)
+ " " + fx2.ToString("0.################").PadLeft(24)
+ " " + e.ToString(CultureInfo.InvariantCulture).PadLeft(8) + "");
}
}
