| Biweight | Kernel functions |
| Epanechnikov | Kernel functions |
| Gaussian | Kernel functions |
| hopt.cutoff | Power-optimal bandwidth and critical value |
| kde | Kernel Density Estimation |
| NDistDens | Select null distribution |
| Rectangular | Kernel functions |
| S.n | Goodness-of-Fit test statistic based on discretized L2 distance |
| Triangular | Kernel functions |