<code>gf_density_2d.Rd</code></div>
    </div>

    <div class="ref-description">
    <p>Perform a 2D kernel density estimation using <code><a href="https://rdrr.io/pkg/MASS/man/kde2d.html" class="external-link">MASS::kde2d()</a></code> and
display the results with contours. This can be useful for dealing with
overplotting. This is a 2D version of <code><a href="https://ggplot2.tidyverse.org/reference/geom_density.html" class="external-link">geom_density()</a></code>. <code><a href="https://ggplot2.tidyvers