| animation | Create an animated GIF and a snapshot from the rgl device |
| biplot_2d | 2D biplot |
| biplot_3d | 3D biplot |
| calculate_aspect | Calculate aspect |
| ellipsoid_3d | Draw an labeled custom ellipsoid |
| ellipsoids_3d | Draw ellipsoids per group |
| filter_arrows | Filter covariance arrows for biplots |
| get_colors | Get colors for the different levels of a factor variable |
| get_lambda | Calculate lambda (biplot) |
| radial_arrows_3d | Places a set of arrows in a rgl device |
| rgl_format | Set up a rgl device |
| rgl_init | Initializes a rgl device |
| scale_to_main | Scale a 'fig' argument to fit another |
| star_3d | Draw star |
| stars_3d | Draw stars per group |
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