plotrix (version 3.8-4)

gap_barp: Display a barplot with a gap (missing range) on one axis

Description

Displays a barplot with a missing range.

Usage

gap_barp(height,gap,width=0.4,names.arg=names(height),
 col=NULL,main="",xlab="",ylab="",xlim=NULL,ylim=NULL,x=NULL,
 height.at=pretty(height),height.lab=NULL,...)

Value

The center positions of the bars.

Arguments

height

a vector of data values

gap

the range of values to be left out

width

the proportion of bar width to bar spacing divided by 2. width=1 means no spaces between the bars.

names.arg

labels for the bars.

col

color(s) in which to plot the values

main

title for the plot.

xlab

label for the x axis

ylab

label for the y axis

xlim

Optional x limits for the plot

ylim

optional y limits for the plot

x

optional x positions for the bars.

height.at

explicit positions for the y axis ticks

height.lab

explicit labels for the y axis ticks.

...

arguments passed to barp.

Author

Jim Lemon

Details

Displays a barplot omitting a range of values on the X or Y axis. Typically used when there is a relatively large gap in the range of values represented as bar heights. See axis.break for a brief discussion of plotting on discontinuous coordinates.

If the user does not ask for specific y limits, the function will calculate limits based on the range of the data values. If passing specific limits, remember to subtract the gap from the upper or lower limit.

See Also

barp

Examples

 oneout<-c(rnorm(5,sd=5),20,rnorm(5,sd=5))
 gap_barp(oneout,gap=c(8,16),xlab="Index",height.at=c(-5,0,5,20),
  ylab="Group values",main="Barplot with gap above zero")
 oneout[6]<--20
 gap_barp(oneout,gap=c(-8,-16),xlab="Index",height.at=c(-20,-5,0,5),
  ylab="Group values",main="Barplot with gap below zero")