private void IterativePrepare(double xs)
{
zedIterative.GraphPane.CurveList.Clear();
MyExtension.Function f = (x => Math.Pow(Math.Abs(Math.Cos(x)), 0.5));
zedIterative.Graph(f, -10, 10, 0.1, Color.Red);
zedIterative.Graph(x => x, -10, 10, 1, Color.Blue);
PointPairList list = new PointPairList();
double x0, x1 = xs;
iterativeLogger.Items.Clear();
list.Add(x1, f(x1));
do
{
x0 = x1;
x1 = f(x0);
list.Add(x0, x1);
iterativeLogger.Items.Add(
String.Format("X = + {0:0.#####} + ; f(x) = + {1:0.########}", x1, f(x1)));
} while (Math.Abs(x1 - x0) > Eps);
LineItem line = zedIterative.GraphPane.AddCurve("", list, Color.Green, SymbolType.Diamond);
line.Line.IsVisible = false;
zedIterative.AxisChange();
}
private void ChordPrepare(double a, double b)
{
zedChord.GraphPane.CurveList.Clear();
MyExtension.Function f = (x => x * x * x - 18 * x - 83);
zedChord.Graph(f, 2, 10, 0.1, Color.Blue);
double x0 = a, x1 = b, x2;
PointPairList list = new PointPairList();
ChordLogger.Items.Clear();
do
{
x2 = x1 - f(x1) * (x1 - x0) / (f(x1) - f(x0));
x0 = x1;
x1 = x2;
list.Add(x2, f(x2));
ChordLogger.Items.Add(
String.Format("x = {0:0.#####}, f(x) = {1:0.##########}", x2, f(x2)));
} while (Math.Abs(f(x2)) > Eps);
LineItem line = zedChord.GraphPane.AddCurve("", list, Color.Green, SymbolType.Diamond);
line.Line.IsVisible = false;
zedChord.AxisChange();
}
private void NewtonPrepare(double xs)
{
zedNewton.GraphPane.CurveList.Clear();
MyExtension.Function f = (x => - Math.Pow(x, 3) + Math.Cos(x));
MyExtension.Function fs = (x => - 3 * x * x - Math.Sin(x));
zedNewton.Graph(f, -2, 2, 0.05, Color.Red);
double x0, x1 = xs;
PointPairList list = new PointPairList();
list.Add(x1, f(x1));
NewtonLogger.Items.Clear();
do
{
x0 = x1;
x1 = x0 - f(x0) / fs(x0);
list.Add(x1, f(x1));
NewtonLogger.Items.Add(
String.Format("x={0:0.###},f(x)={1:0.############}", x1, f(x1)));
} while (Math.Abs(f(x1)) > Eps);
LineItem line = zedNewton.GraphPane.AddCurve("", list, Color.Green, SymbolType.Diamond);
line.Line.IsVisible = false;
zedNewton.AxisChange();
}