public double ChordIterativeMethodRun()
{
var method = new ChordIterativeMethod(function1, a1, b1, eps);
double root = method.Calculate();
Plots.DrawChordMethodFunction(method.Roots, b1, function1);
return(root);
}
private double NewtonIterativeMethodRun()
{
var method = new NewtonIterativeMethod(function1, derivative, a1, b1, eps);
double root = method.Calculate();
Plots.DrawNewtonMethodFunction(method.Roots, function1);
return(root);
}
private double SimpleIterativeMethodRun()
{
var method = new SimpleIterativeMethod(function1, derivative, a1, b1, eps);
double root = method.Calculate();
Plots.DrawSimpleMethodFunction(method.Roots);
return(root);
}
private void calculateButton_Click(object sender, RoutedEventArgs e)
{
try
{
function1 = ExpressionParser.GetFunction(functionInput.Text);
derivative = ExpressionParser.GetFunction(derivativeInput.Text);
a1 = double.Parse(intervalInputA.Text);
b1 = double.Parse(intervalInputB.Text);
if (a1 >= b1)
{
throw new ArgumentException($"Incorrect interval: [{a1}; {b1}]\nb must be greater then a");
}
eps = double.Parse(epsilonInput.Text);
Plots.PlotUnit1Model.Series.Clear();
Plots.DrawInterval(Plots.PlotUnit1Model, a1, b1);
Plots.DrawFunction(Plots.PlotUnit1Model, function1, a1, b1);
double root = 0;
if (methodSelect.SelectedIndex == 0)
{
root = SimpleIterativeMethodRun();
}
else if (methodSelect.SelectedIndex == 1)
{
root = NewtonIterativeMethodRun();
}
else if (methodSelect.SelectedIndex == 2)
{
root = ChordIterativeMethodRun();
}
Plots.PlotUnit1Model.InvalidatePlot(true);
resultTextBox.Text = $"x = {root}";
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error");
}
}
private void interpolateButton2_Click(object sender, RoutedEventArgs e)
{
try
{
string[] xValuesString = xValuesInput.Text.TrimEnd(';').Split(';');
double[] xValues = new double[xValuesString.Length];
for (int i = 0; i < xValuesString.Length; ++i)
{
xValues[i] = double.Parse(xValuesString[i]);
}
string[] yValuesString = yValuesInput.Text.TrimEnd(';').Split(';');
double[] yValues = new double[yValuesString.Length];
for (int i = 0; i < yValuesString.Length; ++i)
{
yValues[i] = double.Parse(yValuesString[i]);
}
if (xValues.Length == 0 || yValues.Length == 0)
{
throw new ArgumentException("One of the value lists is empty");
}
if (xValues.Length != yValues.Length)
{
throw new ArgumentException("Lists of values have different lengths");
}
if (methodSelect3.SelectedIndex == 0)
{
interpolationMethod2 = new LagrangeInterpolationMethod(xValues, yValues);
}
else if (methodSelect3.SelectedIndex == 1)
{
interpolationMethod2 = new NewtonInterpolationForwardUniformMethod(xValues, yValues);
}
else if (methodSelect3.SelectedIndex == 2)
{
interpolationMethod2 = new NewtonInterpolationBackUniformMethod(xValues, yValues);
}
else if (methodSelect3.SelectedIndex == 3)
{
interpolationMethod2 = new NewtonInterpolationForwardUnevenMethod(xValues, yValues);
}
else if (methodSelect3.SelectedIndex == 4)
{
interpolationMethod2 = new NewtonInterpolationBackUnevenMethod(xValues, yValues);
}
Plots.PlotInterpol2Model.Series.Clear();
Plots.DrawFunction(Plots.PlotInterpol2Model, interpolationMethod2.Polynom, xValues[0], xValues[xValues.Length - 1], "255,100,100,200", "Interpolation polynom");
Plots.DrawPoints(Plots.PlotInterpol2Model, xValues, yValues);
Plots.PlotInterpol2Model.InvalidatePlot(true);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error");
}
}
private void interpolateButton_Click(object sender, RoutedEventArgs e)
{
try
{
function2 = ExpressionParser.GetFunction(functionInput2.Text);
int nNodes = (int)nodesSlider.Value;
a2 = double.Parse(intervalInputA2.Text);
b2 = double.Parse(intervalInputB2.Text);
if (a2 >= b2)
{
throw new ArgumentException($"Incorrect interval: [{a2}; {b2}]\nb must be greater then a");
}
if (methodSelect2.SelectedIndex == 1 || methodSelect2.SelectedIndex == 2)
{
nodesSelectMode.SelectedIndex = 0;
}
double[] xValues = null;
if (nodesSelectMode.SelectedIndex == 0)
{
xValues = InterpolationNodesSelector.SelectUniform(a2, b2, nNodes);
}
else if (nodesSelectMode.SelectedIndex == 1)
{
xValues = InterpolationNodesSelector.SelectChebyshev(a2, b2, nNodes);
}
double[] yValues = new double[nNodes];
for (int i = 0; i < nNodes; ++i)
{
yValues[i] = function2(xValues[i]);
}
IInterpolationMethod interpolationMethod = null;
if (methodSelect2.SelectedIndex == 0)
{
interpolationMethod = new LagrangeInterpolationMethod(xValues, yValues);
}
else if (methodSelect2.SelectedIndex == 1)
{
interpolationMethod = new NewtonInterpolationForwardUniformMethod(xValues, yValues);
}
else if (methodSelect2.SelectedIndex == 2)
{
interpolationMethod = new NewtonInterpolationBackUniformMethod(xValues, yValues);
}
else if (methodSelect2.SelectedIndex == 3)
{
interpolationMethod = new NewtonInterpolationForwardUnevenMethod(xValues, yValues);
}
else if (methodSelect2.SelectedIndex == 4)
{
interpolationMethod = new NewtonInterpolationBackUnevenMethod(xValues, yValues);
}
Plots.PlotUnit2Model.Series.Clear();
Plots.DrawInterval(Plots.PlotUnit2Model, a2, b2);
Plots.DrawFunction(Plots.PlotUnit2Model, function2, a2, b2, "255,100,200,100", $"y = {functionInput2.Text}");
Plots.DrawFunction(Plots.PlotUnit2Model, interpolationMethod.Polynom, a2, b2, "255,100,100,200", "Interpolation polynom");
Plots.DrawPoints(Plots.PlotUnit2Model, xValues, yValues);
Plots.PlotUnit2Model.InvalidatePlot(true);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error");
}
}
