private double GetK(PiecewiseLinearApproximationData approximationData)
{
// k = (f1 - f0)/(x1 - x0);
double k = (approximationData.YForNextExistingX - approximationData.YForPreviousExistingX) /
(approximationData.NextExistingX - approximationData.PreviousExistingX);
return(k);
}
private double CalculateY(PiecewiseLinearApproximationData approximationData, LinearFunctionParameters linearFunctionParameters)
{
// y = k * x+ b
linearFunctionParameters.K = GetK(approximationData);
linearFunctionParameters.B = GetB(approximationData.YForPreviousExistingX, linearFunctionParameters.K, approximationData.PreviousExistingX);
double y = linearFunctionParameters.K * linearFunctionParameters.X + linearFunctionParameters.B;
return(y);
}
public double GetY(double x)
{
PiecewiseLinearApproximationData approximationData = GetApproximationData(x);
LinearFunctionParameters linearFunctionParameters = new LinearFunctionParameters();
linearFunctionParameters.X = x;
double y = CalculateY(approximationData, linearFunctionParameters);
return(y);
}
