private Point Interpolate(Point pt, InterpolationMethod method)
{
if (pt.IsMissing)
{
return(new Point(pt.DateTime, Point.MissingValueFlag));
}
if (pt.Value > MaxXValue())
{
return(new Point(pt.DateTime, Point.MissingValueFlag));
}
if (pt.Value < MinXValue())
{ // if first value in table computes zero, then extrapolate a zero.
if (System.Math.Abs(MinYValue()) < 0.01)
{
return(new Point(pt.DateTime, 0, PointFlag.Edited));
}
return(new Point(pt.DateTime, Point.MissingValueFlag));
}
var d = Math.Interpolate(this, pt.Value, this.columnx.ColumnName, this.columny.ColumnName, method);
return(new Point(pt.DateTime, d));
}
/// <summary>
/// interpolation for OWRD shifts.
/// extrapolate values lower than minimum using the minimum
/// </summary>
/// <param name="val"></param>
/// <returns></returns>
public double InterpolateExtrapolateLow(double val)
{
if (val > MaxXValue())
{
return(Point.MissingValueFlag);
}
if (val < MinXValue())
{
return(MinYValue());
}
return(Math.Interpolate(this, val, this.columnx.ColumnName, this.columny.ColumnName));
}
public double Interpolate(double val)
{
if (val > MaxXValue())
{
return(Point.MissingValueFlag);
}
if (val < MinXValue())
{ // if last value on table computes zero, then extrapolate a zero.
if (System.Math.Abs(MinYValue()) < 0.01)
{
return(0);
}
return(Point.MissingValueFlag);
}
return(Math.Interpolate(this, val, this.columnx.ColumnName, this.columny.ColumnName));
}