public void Interpolate_slow_deg4_tsin_ZeroTrace_NewMethod()
{
//setup
double EPS = 0.1d;
double a = 0d;
double b = Math.PI;
int GridSize = 14;
int deg = 4;
int p = deg - 1;
Vector uni_grid = Vector.CreateUniformGrid(GridSize, a, b);
Vector f = MyMath.Basic.GetVectorFunction(GridSize, a, b, FunctionLib.tttsin);
//run
BasisSpline bspline = new BasisSpline(deg, uni_grid, f, GridType.SimpleSplineGrid);
Vector c = BasisSpline.SimpleInterpolate(f, bspline.grid, deg);
Vector basis_c = new Vector(c.Length + 2 * (deg - 1));
for (int i = 0; i < c.Length; i++)
{
basis_c[i + p] = c[i];
}
bspline.SetNewCoefs(basis_c);
Vector bf = bspline.GetVectorFunction(uni_grid);
////compare
int N = 150;
Vector expect = MyMath.Basic.GetVectorFunction(N, a, b, FunctionLib.tttsin);
Vector actual = bspline.GetVectorFunction(N, a, b);
double result = (expect - actual).Norm;
Console.WriteLine("Степень сплайна = " + deg);
Console.WriteLine("Сетка по которой построен сплайн = " + uni_grid.ToString());
Console.WriteLine("trace( f ) = <" + f[0].ToString("0.000") + ", " + f.Last.ToString("0.000") + ">");
Console.WriteLine("coef = " + basis_c); //bspline.COEFICIENT.ToString());
Console.WriteLine("значение f(x) = " + f.ToString());
Console.WriteLine("значение bf(x) = " + bf.ToString());
Console.WriteLine("||f - spline|| = " + result.ToString("0.0000"));
Assert.AreEqual(0, result, EPS, "Плохая интерполяция!");
}
