l kernel regression, density or variogram estimation) could be emphasized: <code><a href="reference/binning.html">binning()</a></code>, <code><a href="reference/bin.den.html">bin.den()</a></code>, <code><a href="reference/svar.bin.html">svar.bin()</a></code>, <code><a href="reference/h.cv.html">h.cv()</a></code> and <code><a href="reference/interp.html">interp()</a></code>. There are functions for plotting data joint with a legend representing a continuous color scale (based on <code><a href="https://rdrr.i