I recently started using Strata for linear interpolation and extrapolation.Prior to this I had developed a custom method to calculate extrapolated points
y + (y - y) * (Xn - x) / (x - x) for points on short end
y[y.length - 2] + (y[y.length - 1] - y[y.length - 2]) * (Xn - x[x.length - 2])
/ (x[x.length - 1] - x[x.length - 2]) for long end.
However strata extraplators have used a epsilon component that changes the value of extrapolated point.
What is the purpose of EPS?