static void Main(string[] args)
{
string fileName = "data.txt";
List <string> strings = File.ReadAllLines(fileName).ToList();
List <double> x_s = strings
.First()
.Split(new char[] { '\t' }, StringSplitOptions.RemoveEmptyEntries)
.Select(x => double.Parse(x))
.ToList();
List <double> y_s = strings
.Last()
.Split(new char[] { '\t' }, StringSplitOptions.RemoveEmptyEntries)
.Select(x => double.Parse(x))
.ToList();
Console.WriteLine(x_s.First());
Console.WriteLine(x_s.Last());
Langrange langrange = new Langrange(x_s, y_s);
double minValue = x_s.First();
double maxValue = x_s.Last();
int numberOfPoints = 300;
double step = (Math.Abs(minValue) + Math.Abs(maxValue)) / numberOfPoints;
List <double> pol_x = new List <double>();
for (int i = 0; i <= numberOfPoints; ++i)
{
pol_x.Add(Math.Round(minValue + step * i, preciosion));
}
Show(pol_x);
}
public void Langrange(IEnumerable <double> x_s,
IEnumerable <double> y_s)
{
PlotView plotView = new PlotView();
plotView.Dock = DockStyle.Fill;
if (panel1_1.Controls.Count != 0)
{
panel1_1.Controls.RemoveAt(0);
}
panel1_1.Controls.Add(plotView);
LinearAxis XAxis = new LinearAxis()
{
Position = AxisPosition.Bottom,
Minimum = x_s.First(),
Maximum = x_s.Last()
};
PlotModel plotModel = new PlotModel();
plotView.Model = plotModel;
Langrange langrange = new Langrange(x_s, y_s);
List <double> plot_x = new List <double>();
double step = (Math.Abs(x_s.First()) + Math.Abs(x_s.Last())) / N;
for (int i = 0; i <= N; ++i)
{
plot_x.Add(x_s.First() + step * i);
}
List <double> plot_y = new List <double>();
foreach (var x in plot_x)
{
plot_y.Add(langrange.GetLangrangePolynominal(x));
}
FunctionSeries functionSeries = new FunctionSeries();
Series series = new LineSeries();
for (int i = 0; i < plot_x.Count; ++i)
{
DataPoint dataPoint = new DataPoint(plot_x[i], plot_y[i]);
functionSeries.Points.Add(dataPoint);
}
plotView.Model.Series.Add(functionSeries);
if (_plotModels.ContainsKey("Langrange"))
{
_plotModels.Remove("Langrange");
}
_plotModels.Add("Langrange", plotModel);
}
