Creating a Gaussian Curve

A Gaussian or normal curve is used to show a distribution of probability over the values of a random variable.

To create a Gaussian Curve in C1Chart, use the following code:

C#	Copy Code
// create and add to the chart data series representing Gaussian function // y(x) = a * exp( -(x-b)(x-b) / (2cc)) // in the interval from x1 to x2 void CreateGaussian(double x1, double x2, double a, double b, double c) { // number of points int cnt = 200; var xvals = new double[cnt]; var yvals = new double[cnt]; double dx = (x2 - x1) / (cnt-1); for (int i = 0; i < cnt; i++) { var x = x1 + dx i; xvals[i] = x; x = (x - b) / c; yvals[i] = a * Math.Exp(-0.5xx); } var ds = new XYDataSeries() { XValuesSource = xvals, ValuesSource = yvals, ChartType = ChartType.Line }; chart.Data.Children.Add(ds); }

Copy Code

  // create and add to the chart data series representing Gaussian function
    //   y(x) = a * exp( -(x-b)*(x-b) / (2*c*c))
    // in the interval from x1 to x2
    void CreateGaussian(double x1, double x2, double a, double b, double c)
    {
      // number of points
      int cnt = 200;       var xvals = new double[cnt];
      var yvals = new double[cnt];

      double dx = (x2 - x1) / (cnt-1);

      for (int i = 0; i < cnt; i++)
      {
        var x = x1 + dx * i;
        xvals[i] = x;
        x =  (x - b) / c;
        yvals[i] = a * Math.Exp(-0.5*x*x);
      }

      var ds = new XYDataSeries()
      {
        XValuesSource = xvals,
        ValuesSource = yvals,
        ChartType = ChartType.Line
      };

      chart.Data.Children.Add(ds);
    }