Margin Titles

Writes overall titles and subtitles after a multiple image plot is drawn. If par()$oma==c(0,0,0,0), title is used instead of mtext, to draw titles or subtitles that are inside the plotting region for a single plot.

Usage

mtitle(main, ll, lc,  
       lr=format(Sys.time(),'%d%b%y'),
       cex.m=1.75, cex.l=.5, ...)

Arguments

main: main title to be centered over entire figure, default is none
ll: subtitle for lower left of figure, default is none
lc: subtitle for lower center of figure, default is none
lr: subtitle for lower right of figure, default is today's date in format 23Jan91 for UNIX or R (Thu May 30 09:08:13 1996 format for Windows). Set to "" to suppress lower right title.
cex.m: character size for main, default is 1.75
cex.l: character size for subtitles
...: other arguments passed to mtext

Value

nothing

Author

Frank Harrell
Department of Biostatistics, Vanderbilt University
fh@fharrell.com

Side Effects

plots

Examples

#Set up for 1 plot on figure, give a main title,
#use date for lr
plot(runif(20),runif(20))
mtitle("Main Title")



#Set up for 2 x 2 matrix of plots with a lower left subtitle and overall title
par(mfrow=c(2,2), oma=c(3,0,3,0))
plot(runif(20),runif(20))
plot(rnorm(20),rnorm(20))
plot(exp(rnorm(20)),exp(rnorm(20)))
mtitle("Main Title",ll="n=20")