plotrix (version 2.3-1)

stackpoly: Display the columns of a matrix or data frame as stacked polygons.

Description

Plot one or more columns of numeric values as the top edges of polygons instead of lines.

Usage

stackpoly(x,main="",xlab="",ylab="",xat=NA,xaxlab=NA,ylim=NA,lty=1,
  border=NA,col=NA,staxx=FALSE,axis4=TRUE,...)

Arguments

x

A numeric data frame or matrix with the x values in the first column followed by one or more columns of y values.

main

The title for the plot.

xlab,ylab

x and y axis labels for the plot.

xat

Where to put the optional xaxlabs.

xaxlab

Optional labels for the x positions.

ylim

Optional y limits.

lty

Line type for the polygon borders.

border

Color for the polygon borders.

col

Color to fill the polygons.

staxx

Whether to call staxlab to stagger the x axis labels.

axis4

Whether to display the right ordinate on the plot.

...

Additional arguments passed to plot.

Value

• nil

Details

stackpoly is similar to a line plot with the area under the lines filled with color(s). Ideally, each successive set of y values (columns 2 to n of x) is greater than the values in the previous set so that the polygons form a rising series of crests.

See Also

polygon

Examples

testx<-matrix(cumsum(abs(rnorm(100))),nrow=10)
 stackpoly(testx,main="Test Stackpoly",
  xaxlab=c("One","Two","Three","Four","Five",
  "Six","Seven","Eight","Nine","Ten"),staxx=TRUE)