Contour Plots, 3D Plots, Vector Fields and Heatmaps

Combined contour/heatmap plots, 3d bar/surface plots, 2d/3d triangular plots, isosurface plots and 2d/3d vector fields. By default, uses vector graphics, but it's possible to use raster graphics for regular heatmaps. Builds on the colorspace package (Zeileis, et al., 2020 ), by supporting smooth multiband color interpolation, in sRGB, HSV and HCL color spaces.