plotrix (version 2.8-3)

axis.mult: Display an axis with values having a multiplier

Description

An axis is displayed on an existing plot where the tick values are divided by a multiplier and the multiplier is displayed next to the axis.

Usage

axis.mult(side=1,at=NULL,labels,mult=1,mult.label,mult.line,
  mult.labelpos=NULL,...)

Arguments

side

which side to display

at

where to place the tick marks - defaults to axTicks()

labels

tick labels - defaults to at/mult

mult

the multiplier factor

mult.label

the label to show the multiplier - defaults to "x mult"

mult.line

the margin line upon which to show the multiplier

mult.labelpos

where to place mult.label - defaults to centered and outside the axis tick labels

...

additional arguments passed to axis.

Value

• nil

Details

axis.mult automates the process of displaying an axis with a multiplier applied to the tick values. By default it will divide the default axis tick labels by mult and place mult.label where xlab or ylab would normally appear. Thus the plot call should set the relevant label to an empty string in such cases. It is simplest to call plot with axes=FALSE and then display the box and any standard axes before calling axis.mult.

See Also

axis, mtext

Examples

plot(1:10*0.001,1:10*100,axes=FALSE,xlab="",ylab="",main="Axis multipliers")
 box()
 axis.mult(1,mult=0.001)
 axis.mult(2,mult=100)