.BuildSysPro.IBPSA.Utilities.Math.Functions.cubicHermiteLinearExtrapolation

Information

For x₁ < x < x₂, this function interpolates using cubic hermite spline. For x outside this interval, the function linearly extrapolates.

For how to use this function, see IBPSA.Utilities.Math.Functions.Examples.CubicHermite.

Interface

function cubicHermiteLinearExtrapolation
  extends Modelica.Icons.Function;
  input Real x "Abscissa value";
  input Real x1 "Lower abscissa value";
  input Real x2 "Upper abscissa value";
  input Real y1 "Lower ordinate value";
  input Real y2 "Upper ordinate value";
  input Real y1d "Lower gradient";
  input Real y2d "Upper gradient";
  output Real y "Interpolated ordinate value";
end cubicHermiteLinearExtrapolation;

Revisions

• September 27, 2011 by Michael Wetter:
  First implementation.