fill.density: Fill-in the density plot
In twolodzko/twextras: twextras

Fill-in the density plot

1 2	fill.density(density, min.x, max.x, col = "lightgray", ..., border = NA, add = TRUE, drawagain = TRUE, lcol = "black")

`density`	output of `density` function or a data.frame with x and y columns where x are data points and y is density
`min.x, max.x`	boundries of area to fill-in; if not provided the whole density is filled; if only one of them is provided the second one is defined as the smallest or the largest x value
`col, border, ...`	parameters of `polygon` function
`add`	if `TRUE` (default) the filled area is added to already existing plot
`drawagain`	if `TRUE` (default) lines of density plot are drawn over the existing plot for better outlook
`lcol`	`col` parameter for `plot.density`