Optionalmethod"fmm" (default), "natural", "periodic" or "hyman".
OptionalnNumber of equally spaced points from xmin to xmax. Default 3 * x.length.
OptionaltiesHow to merge equal x values. Default "mean".
OptionalxmaxRight end of the equally spaced points. Default: the largest x.
OptionalxminLeft end of the equally spaced points. Default: the smallest x.
OptionalxoutPoints to interpolate at (then n, xmin and xmax are not used).
Options for spline.