Example: Stacked Bar Chart

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

public class BarEx1 : FrameChart 
{

	public BarEx1() 
	{
		Chart chart = this.Chart;
		AxisXY axis = new AxisXY(chart);
		
		int nStacks = 2;
		int nGroups = 3;
		int nItems = 6;
		
		//	Generate some random data
		Imsl.Stat.Random r = new Imsl.Stat.Random(123457);

		double[] dbl = new double[50];
		dbl[0]=0.41312962995625035;
		dbl[1]=0.15995876895053263;
		dbl[2]=0.8225528716547005;
		dbl[3]=0.48794367683379836;
		dbl[4]=0.44364905186692527;
		dbl[5]=0.20896329070872555;
		dbl[6]=0.9887088342522812;
		dbl[7]=0.4781765623804778;
		dbl[8]=0.9647868112234352;
		dbl[9]=0.6732389937186418;
		dbl[10]=0.5668831243079411;
		dbl[11]=0.33081942994459734;
		dbl[12]=0.27386697614898103;
		dbl[13]=0.10880787186704965;
		dbl[14]=0.8805853693809824;
		dbl[15]=0.901138442534768;
		dbl[16]=0.7180829622748057;
		dbl[17]=0.48723656383264413;
		dbl[18]=0.6153607537410654;
		dbl[19]=0.10153552805288812;
		dbl[20]=0.3158193853638753;
		dbl[21]=0.9558058275075961;
		dbl[22]=0.10778543304578747;
		dbl[23]=0.011829287599608884;
		dbl[24]=0.09275375134615693;
		dbl[25]=0.4859902873228249;
		dbl[26]=0.9817642781628322;
		dbl[27]=0.5505301300240635;
		dbl[28]=0.467363186309925;
		dbl[29]=0.18652444274911184;
		dbl[30]=0.9066980293517674;
		dbl[31]=0.9272326533193322;
		dbl[32]=0.31440695305815347;
		dbl[33]=0.4215880116306273;
		dbl[34]=0.9991560762956562;
		dbl[35]=0.0386317648903991;
		dbl[36]=0.785150345014761;
		dbl[37]=0.6451521871931544;
		dbl[38]=0.7930129038729785;
		dbl[39]=0.819301055474355;
		dbl[40]=0.5695413465811706;
		dbl[41]=0.039285689951912395;
		dbl[42]=0.7625752595574732;
		dbl[43]=0.31325564481720314;
		dbl[44]=0.0482465474704169;
		dbl[45]=0.6272275622766595;
		dbl[46]=0.09904819350827354;
		dbl[47]=0.8934533907186641;
		dbl[48]=0.7013979421419555;
		dbl[49]=0.5212913217641422;

		int z=0;

		double[] x = new double[nItems];
		double[][][] y = new double[nStacks][][];
		for (int i = 0; i < nStacks; i++)
		{
			y[i] = new double[nGroups][];
			for (int i2 = 0; i2 < nGroups; i2++)
			{
				y[i][i2] = new double[nItems];
			}
		}
		double dx = 0.5 * System.Math.PI / (x.Length - 1);
		for (int istack = 0; istack < y.Length; istack++)
		{
			for (int jgroup = 0; jgroup < y[istack].Length; jgroup++)
			{
				for (int kitem = 0; kitem < y[istack][jgroup].Length; kitem++)
				{
					y[istack][jgroup][kitem] = dbl[z];//r.NextDouble();
					z++;
				}
			}
		}
		
		//	Create an instance of a Bar Chart
		Bar bar = new Bar(axis, y);
		
		//	Set the Bar Chart Title
		chart.ChartTitle.SetTitle("Sales by Region");
		
		//	Set the fill outline type;
		bar.FillOutlineType = Bar.FILL_TYPE_SOLID;
		
		System.Drawing.Color GREEN = System.Drawing.Color.FromArgb(0, 255, 0);
		//	Set the Bar Item fill colors
		bar.GetBarSet(0, 0).FillColor = System.Drawing.Color.Red;
		bar.GetBarSet(0, 1).FillColor = System.Drawing.Color.Yellow;
		bar.GetBarSet(0, 2).FillColor = GREEN;
		bar.GetBarSet(1, 0).FillColor = System.Drawing.Color.Blue;
		bar.GetBarSet(1, 1).FillColor = System.Drawing.Color.Cyan;
		bar.GetBarSet(1, 2).FillColor = System.Drawing.Color.Magenta;

		chart.Legend.IsVisible = true;
		bar.GetBarSet(0, 0).SetTitle("Red");
		bar.GetBarSet(0, 1).SetTitle("Yellow");
		bar.GetBarSet(0, 2).SetTitle("Green");
		bar.GetBarSet(1, 0).SetTitle("Blue");
		bar.GetBarSet(1, 1).SetTitle("Cyan");
		bar.GetBarSet(1, 2).SetTitle("Magenta");
		
		// Setup the vertical axis for a labeled bar chart.
		System.String[] labels = new System.String[]{"New York", "Texas",
         "Northern\nCalifornia", "Southern\nCalifornia", "Colorado",
         "New Jersey"};
		bar.SetLabels(labels, Imsl.Chart2D.Bar.BAR_TYPE_VERTICAL);
		
		//	Set the text angle
		axis.AxisX.AxisLabel.TextAngle = 270;
		
		//	Set the Y axis title
		axis.AxisY.AxisTitle.SetTitle("Sales ($million)\nby " + "widget color");

	}

	public static void Main(string[] argv) 
	{
		System.Windows.Forms.Application.Run(new BarEx1());
	}
}

Output

Link to C# source.