plotrix (version 3.8-4)

getMarginWidth: Find the margin width necessary to fit text or a legend next to a plot

Description

Calculates the margin width necessary to fit text or a legend next to a plot.

Usage

getMarginWidth(side=4,labels,is.legend=FALSE)

Value

A two element list containing the number of margin lines necessary to fit the text or legend and the horizontal center of the margin in user units.

Arguments

side

Which side of the plot (as in axis).

labels

The text to place next to the plot.

is.legend

Whether the text is in a legend or not.

Author

Jim Lemon

Details

getMarginWidth reads parameters about the current plot and calculates the left or right (default) margin necessary to fit the strings passed as labels or a legend containing those strings.

Examples

 plot(rnorm(10))
 newmarinfo<-getMarginWidth(labels=c("Long label","Even longer label"))
 oldmar<-par("mar")
 par(mar=c(oldmar[1:3],newmarinfo$newmar))
 plot(rnorm(10))
 par(xpd=TRUE)
 text(rep(newmarinfo$marcenter,2),c(0.5,-0.5),
  c("Long label","Even longer label"))
 par(mar=oldmar,xpd=FALSE)