/// <summary>
/// Append a sample to the collection
/// </summary>
/// <param name="sample">The sample to append</param>
/// <returns>The ordinal position at which the sample was added</returns>
public int Add( Sample sample )
{
return list.Add( sample );
}
/// <summary>
/// Get the specified data type from the specified sample
/// </summary>
/// <param name="sample">The sample instance of interest</param>
/// <param name="type">The data type to be extracted from the sample</param>
/// <returns>A double value representing the requested data</returns>
public double GetValue( Sample sample, SampleType type )
{
switch ( type )
{
case SampleType.Position:
return sample.Position;
case SampleType.Time:
return sample.Time.ToOADate();
case SampleType.TimeDiff:
return sample.Time.ToOADate() - ( (Sample)list[0] ).Time.ToOADate();
case SampleType.VelocityAvg:
double timeDiff = sample.Time.ToOADate() - ( (Sample)list[0] ).Time.ToOADate();
if ( timeDiff <= 0 )
return PointPair.Missing;
else
return ( sample.Position - ( (Sample)list[0] ).Position ) / timeDiff;
case SampleType.VelocityInst:
return sample.Velocity;
default:
return PointPair.Missing;
}
}
private void CreateGraph_SamplePointListDemo( ZedGraphControl z1 )
{
GraphPane myPane = z1.GraphPane;
myPane.Title.Text = "Demonstration of SamplePointList";
myPane.XAxis.Title.Text = "Time since start, days";
myPane.YAxis.Title.Text = "Postion (meters) or\nAverage Velocity (meters/day)";
myPane.Chart.Fill = new Fill( Color.White, Color.FromArgb( 230, 230, 255 ), 45.0f );
SamplePointList spl = new SamplePointList();
// Calculate sample data _points
// starting position & velocity
double d0 = 15.0; // m
double v0 = 5.2; // m/d
double acc = 11.5; // m/d/d
for ( int i = 0; i < 10; i++ )
{
Sample sample = new Sample();
// Samples are one day apart
sample.Time = new DateTime( 2006, 3, i + 1 );
// velocity in meters per day
sample.Velocity = v0 + acc * i;
sample.Position = acc * i * i / 2.0 + v0 * i + d0;
spl.Add( sample );
}
// Create the first curve as Position vs delta time
spl.XType = SampleType.TimeDiff;
spl.YType = SampleType.Position;
LineItem curve = myPane.AddCurve( "Position", spl, Color.Green, SymbolType.Diamond );
curve.Symbol.Fill = new Fill( Color.White );
curve.Line.Width = 2.0f;
// create the second curve as Average Velocity vs delta time
SamplePointList spl2 = new SamplePointList( spl );
spl2.YType = SampleType.VelocityAvg;
LineItem curve2 = myPane.AddCurve( "Average Velocity", spl2, Color.Blue, SymbolType.Circle );
curve2.Symbol.Fill = new Fill( Color.White );
curve2.Line.Width = 2.0f;
}