path

The smooth path option generates cubic splines to fit points in the order they are presented in the input data; i.e. they are not first sorted on x. This generates a smooth spline through a closed curve or along a trajectory that contains loops. This smoothing mode is supported for both 2D and 3D plot commands. A separate curve is created for each set of points in the input file, where a blank line separates the sets. Plotting smooth path with filledcurves closed will guarantee that each set of points creates a closed curve. Plotting smooth path with lines will generate a closed curve if the first and last points in the set overlap, otherwise it will create an open-ended smooth path. See smooth_path.dem