Extend border of bounded box by +/- e
expand_border(parameters, deltalow, deltahigh, Rlow, Rhigh, e)
A vector of parameters (real numbers) that is generated by estimating the short, intermediate and auxiliary regressions.
The lower limit of delta.
The upper limit of delta.
The lower limit of Rmax.
The upper limit of Rmax.
The step size.
Data frame.