Added the Epanechnikov kernel, a continuous probability distribution that is defined on a finite interval. Similar to the Rational Quadratic, x-axis weighting can be adjusted.
This kernel is less well-known in statistics, as the Gaussian kernel is pretty much the go-to. Epanechnikov, parabolic in nature, may be more efficient.
This addition is displayed in the default setting when you launch the updated version.
Enjoy!