Tim Van Wassenhove

As i wrote already: In a chart the elements on the X-axis are usually numbers or dates, and the elements on the Y-axis are usually doubles. We can define such a combination as following:

public class Point<t>
{
 public T X { get; set; }
 public double Y { get; set; }
}

Here is a little helper function for creating line series that are used by the Silverlight Toolkit:

public LineSeries Create<t>(string title, Series<t> series, Func<t, double> f) where T : IComparable<t>
{
 var points = series.Select(x => new Point<t> { X = x, Y = f(x) });

 var lineSeries = new LineSeries
 {
  Title = title,
  ItemsSource = points,
  IndependentValuePath = "X",
  DependentValuePath = "Y"
 };

 return lineSeries;
}

Given all this infrastructure we can easily draw the graph of a function:

public MainPage()
{
 InitializeComponent();

 var series = 0.To(100);

 Func<int, double> multiplyByTwo = x => 2 * x;
 Chart1.Series.Add(Create("2x", series, multiplyByTwo));

 Func<int, double> multiplyByThree = x => 3 * x;
 Chart1.Series.Add(Create("x/2", series, multiplyByThree));
}

Here is how the result looks like (too much data on the chart):