private void Form1_Paint(object sender, PaintEventArgs e)
{
// デリゲード（メソッドを変数に入れる）とラムダ式（関数を簡単に表現する）のサンプル
Plotter myPlot = new Plotter(ClientSize, e.Graphics);
myPlot.Axis();
Pen myPen = new Pen(Color.Black, 2);
myPlot.Execute(myPen, fx);
myPen.DashStyle = DashStyle.Dash;
myPlot.Execute(myPen, x => - 0.5 * x * (x * x - 1));
Func <double, double> gx = x => - 0.5 * x * x + 1.0;
myPen.DashStyle = DashStyle.Dot;
myPlot.Execute(myPen, gx);
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
Plotter myPlot = new Plotter(ClientSize, e.Graphics);
myPlot.Axis();
// チェビシェフの多項式
const int MAX_ORDER = 4;
Func <double, double>[] Tn = new Func <double, double> [MAX_ORDER + 1];
Tn[0] = x => 1.0;
Tn[1] = x => x;
Tn[2] = x => 2.0 * x * Tn[1](x) - Tn[0](x);
Tn[3] = x => 2.0 * x * Tn[2](x) - Tn[1](x);
Tn[4] = x => 2.0 * x * Tn[3](x) - Tn[2](x);
/* for (int n=2; n<=MAX_ORDER; n++)
* {
* Tn[n] = x => 2.0 * x * Tn[n-1] - Tn[n-2];
* }
*/
// 2次以上の「チェビシェフの多項式」を描画
const int ORDER1 = 2;
Pen[] pen = new Pen[MAX_ORDER - ORDER1 + 1];
for (int n = 0; n < pen.Length; n++)
{
pen[n] = new Pen(Color.Black, 2);
}
pen[1].DashStyle = DashStyle.Dash;
pen[2].DashStyle = DashStyle.Dot;
for (int n = ORDER1; n <= MAX_ORDER; n++)
{
myPlot.Execute(pen[n - ORDER1], Tn[n]);
}
}