shadeArea: Plot a curve with a shaded area.
In jvanheld/stats4bioinfo: Utilities for the book "Statistics for bioinformatics"

Description Usage Arguments Details Author(s) Examples

Plot the curve for a given function, and shade the area below it between two given limits.

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shadeArea(fun, xlim, shade.from = xlim[1], shade.to = xlim[2],
  length = 1000, curve.col = "blue", shade.col = "gray",
  shade.border = NA, draw.curve = TRUE, add = FALSE, ...)

`fun`	function
`xlim`	min and max X value to plot the curve
`shade.border`	Border color. By default the border is not drawed (NA), to let the initial curve unchanged.
`draw.curve`	= TRUE If FALSE, only plot the shaded area
`...`	Additional parameters are passed to fun via lapply
`shade.from=xlim[1]`	min X value for the shaded area
`shade.to=xlim[2]`	max X value for the shaded area
`length=1000`	number of points for the polygon
`shade.col="gray"`	Shading color, passed to polygon()
`add=FALSE`	Add the shaded area to existing plot

First version: 2015-03 Last modification: 2015-03

Jacques van Helden (Jacques.van-Helden@univ-amu.fr)

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## Shade the interval (-1,1) below Student density function
z <- 3.5
shadeArea(dt, xlim=c(-5,+5), shade.from=-1, shade.to=1, df=4, curve.col="darkred", shade.col="#DDBBEE", shade.border="red")