/// <summary>
/// Factory method to create the required implementation of the interpolation algorithm
/// </summary>
/// <param name="fit">interpolation algorithm type</param>
/// <param name="standards">Data points to be fitted</param>
/// <returns>Interpolation algorithm</returns>
public static Interpolator Create(CurveFits fit, IEnumerable <DPoint> standards)
{
Interpolator interp = null;
//ensure points are sorted in order of x values
List <DPoint> standardsList = new List <DPoint>(standards);
standardsList.Sort((a, b) => a.X.CompareTo(b.X));
switch (fit)
{
case CurveFits.Interpolate:
interp = new SimpleInterpolator(standardsList);
break;
case CurveFits.LinearZero:
interp = new BestLineThruOriginInterpolation(standardsList);
break;
case CurveFits.Linear:
interp = new BestLineInterpolation(standardsList);
break;
case CurveFits.Quadratic:
interp = new QuadraticInterpolator(standardsList);
break;
case CurveFits.QuadraticThruZero:
interp = new QuadraticThruZeroInterpolator(standardsList);
break;
default:
break;
}
return(interp);
}
/// <summary>
/// Factory method to create the required implementation of the interpolation algorithm
/// </summary>
/// <param name="fit">interpolation algorithm type</param>
/// <param name="standards">Data points to be fitted</param>
/// <returns>Interpolation algorithm</returns>
public static Interpolator Create(CurveFits fit, IEnumerable<DPoint> standards)
{
Interpolator interp = null;
//ensure points are sorted in order of x values
List<DPoint> standardsList = new List<DPoint>(standards);
standardsList.Sort((a, b) => a.X.CompareTo(b.X));
switch (fit)
{
case CurveFits.Interpolate:
interp = new SimpleInterpolator(standardsList);
break;
case CurveFits.LinearZero:
interp = new BestLineThruOriginInterpolation(standardsList);
break;
case CurveFits.Linear:
interp = new BestLineInterpolation(standardsList);
break;
case CurveFits.Quadratic:
interp = new QuadraticInterpolator(standardsList);
break;
case CurveFits.QuadraticThruZero:
interp = new QuadraticThruZeroInterpolator(standardsList);
break;
default:
break;
}
return interp;
}
public void InterpolatorCalculateTest()
{
List<DPoint> standards = new List<DPoint>();
standards.Add(new DPoint(3, 2));
standards.Add(new DPoint(4, 3));
standards.Add(new DPoint(5, 6));
standards.Add(new DPoint(6, 4));
standards.Add(new DPoint(7, 5));
SimpleInterpolator target = new SimpleInterpolator(standards);
Assert.AreEqual(2, target.Calculate(3));
Assert.AreEqual(3, target.Calculate(4));
Assert.AreEqual(6, target.Calculate(5));
Assert.AreEqual(4, target.Calculate(6));
Assert.AreEqual(5, target.Calculate(7));
//half-way between
Assert.AreEqual(2.5, target.Calculate(3.5));
Assert.AreEqual(4.5, target.Calculate(4.5));
Assert.AreEqual(5, target.Calculate(5.5));
Assert.AreEqual(4.5, target.Calculate(6.5));
}
