Example: Area Chart

using Imsl.Chart2D;
using System;
using System.Windows.Forms;

public class AreaEx1 : FrameChart 
{
	public AreaEx1() 
	{
		Chart chart = this.Chart;
		AxisXY axis = new AxisXY(chart);
		
		int npoints = 20;
		double dx = .5 * System.Math.PI / (npoints - 1);
		double[] x = new double[npoints];
		double[] y1 = new double[npoints];
		double[] y2 = new double[npoints];
		double[] y3 = new double[npoints];
		
		//	Generate some data
		for (int i = 0; i < npoints; i++)
		{
			x[i] = i * dx;
			y1[i] = System.Math.Sin(x[i]);
			y2[i] = System.Math.Cos(x[i]);
			y3[i] = System.Math.Atan(x[i]);
		}
		Data d1 = new Data(axis, x, y1);
		Data d2 = new Data(axis, x, y2);
		Data d3 = new Data(axis, x, y3);
		
		//	Set Data Type to Fill Area
		axis.DataType = Imsl.Chart2D.Data.DATA_TYPE_FILL;
		
		//	Set Line Colors
		d1.LineColor = System.Drawing.Color.Red;
		d2.LineColor = System.Drawing.Color.Black;
		d3.LineColor = System.Drawing.Color.Blue;
		
		//	Set Fill Colors
		d1.FillColor = System.Drawing.Color.Red;
		d2.FillColor = System.Drawing.Color.Black;
		d3.FillColor = System.Drawing.Color.Blue;
		
		//	Set Data Labels
		d1.SetTitle("Sine");
		d2.SetTitle("Cosine");
		d3.SetTitle("ArcTangent");
		
		//	Add a Legend
		Legend legend = chart.Legend;
		legend.SetTitle(new Text("Legend"));
		legend.IsVisible = true;
		
		//	Set the Chart Title
		chart.ChartTitle.SetTitle("Area Plots");
	}

	public static void Main(string[] argv) 
	{
		System.Windows.Forms.Application.Run(new AreaEx1());
	}
}

Output

Link to C# source.