graphFilledBand: Fill the area between two curves on a graph.

In forestgeo/ctfs: Tools for the Analysis of Forest Dynamics

Description

Fill the area between two curves on a graph. Useful for confidence limits, for example.

Usage

graphFilledBand(x, y1, y2, fillcol = "gray", add = TRUE,
  linecol = "black", ltype = "solid", lwidth = 1)

Arguments

x	The x axis values.
y1, y2	Two sets of y axis values, each of exactly the same length as x.
fillcol	The color filling the area between the two curves.
add	Logical. Whether to add elements such as points or line to an existing graph. if TRUE, there must be an appropriate existing graph, otherwise, a new graph is drawn.
linecol	Line colour.
ltype	Line type; see ltype in ?graphics::par().
lwidth	Line width; see width in ?graphics::par().

Details

Typical use is to draw a graph first with some central y values, then add a confidence band by filling the area between upper and lower confidence limits (designated by variables lower.y and upper.y in the example below). The central line should then be redrawn over the filled area.

Customizing plot lines

If add == TRUE, linecol, ltype and lwidth are ignored.

See Also

?graphics::plot(), ?graphics::par().

Examples

## Not run: 
plot(x, y, type = 'l')
graphFilledBand(x, lower.y, upper.y)
lines(x, y)

## End(Not run)

forestgeo/ctfs documentation built on May 3, 2019, 6:44 p.m.