public void Interpolate_slow_deg4_tsin_CompareCoefs_test()
{
//setup
double EPS = 0.1d;
double a = 0d;
double b = 3 * Math.PI;
int GridSize = 17;
int deg = 4;
Vector grid = Vector.CreateUniformGrid(GridSize, a, b);
Vector y = MyMath.Basic.GetVectorFunction(GridSize, a, b, FunctionLib.tsin);
//run
BasisSpline bspline_h = new BasisSpline(deg, GridSize, a, b);
Vector c_h = BasisSpline.Interpolate(y, bspline_h.grid, deg);
bspline_h.SetNewCoefs(c_h);
Vector c_2h_actual = MultyGrid.Proektor.slow_spline_r(c_h);
BasisSpline bspline_2h = bspline_h.GetBasisSpline_Down();
Vector y_2h = MyMath.Basic.GetVectorFunction(c_2h_actual.Length, a, b, FunctionLib.tsin);
Vector c_2h_expect = BasisSpline.Interpolate(y_2h, bspline_2h.grid, deg);
bspline_2h.SetNewCoefs(c_2h_actual);
//compare
Console.WriteLine((c_2h_expect - c_2h_actual).ToString());
double result = (c_2h_expect - c_2h_actual).Norm;
Console.WriteLine("Степень сплайна = " + deg);
Console.WriteLine("Сетка по которой построен сплайн = " + bspline_2h.grid.ToString());
Console.WriteLine("f(x) = " + y);
Console.WriteLine("f(x) 2h = " + y_2h);
Console.WriteLine("actual c 2h = " + c_2h_actual.ToString());
Console.WriteLine("expect c 2h = " + c_2h_expect.ToString());
Console.WriteLine("||f - spline|| = " + result.ToString("0.0000"));
Assert.AreEqual(0, result, EPS, "Плохая интерполяция!");
}
public void Interpolate_slow_deg4_tsin_PROJECTION_test()
{
//setup
double EPS = 0.1d;
double a = 0d;
double b = 2 * Math.PI;
int GridSize = 17;
int deg = 4;
Vector grid = Vector.CreateUniformGrid(GridSize, a, b);
Vector y = MyMath.Basic.GetVectorFunction(GridSize, a, b, FunctionLib.tsin);
//run
BasisSpline bspline_h = new BasisSpline(deg, GridSize, a, b);
Vector c_h = BasisSpline.Interpolate(y, bspline_h.grid, deg);
bspline_h.SetNewCoefs(c_h);
Vector c_2h = MultyGrid.Proektor.slow_spline_r(c_h);
BasisSpline bspline_2h = bspline_h.GetBasisSpline_Down();
bspline_2h.SetNewCoefs(c_2h);
//compare
int N = 50;
Vector expect = MyMath.Basic.GetVectorFunction(N, a, b, FunctionLib.tsin);
Vector actual = bspline_2h.GetVectorFunction(N, a, b);
Console.WriteLine((expect - actual).ToString());
double result = (expect - actual).Norm;
Console.WriteLine("Степень сплайна = " + deg);
Console.WriteLine("Сетка по которой построен сплайн = " + bspline_2h.grid.ToString());
Console.WriteLine("значения х = " + grid.ToString());
Console.WriteLine("значение f(x) = " + y.ToString());
Console.WriteLine("coef h = " + c_h.ToString());
Console.WriteLine("coef 2h = " + bspline_2h.COEFICIENT.ToString());
Console.WriteLine("||f - spline|| = " + result.ToString("0.0000"));
Assert.AreEqual(0, result, EPS, "Плохая интерполяция!");
}
