SpotRateCurveThis method is internally used by the interpolation engine.
The interpolation function is created by calling prepare_interpolation
method.
This method creates the interpolation funcion with the current state of the
curve object and sets this function to the func slot.
interpolate(object, x, ...)A numeric vector with the interpolated values.
The Interpolation object is created with the data point of the curve.
The interpolation method is executed on these points the numeric
vector.