mtitle {Hmisc} | R Documentation

## Margin Titles

### Description

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=if(.R.) format(Sys.time(),'%d%b%y') else
            if(under.unix)unix("date '+%d%h%y'") else date(),
           cex.m=1.75, cex.l=.5, ...)
    none

### 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

### Side Effects

plots

### Author(s)

Frank Harrell
Department of Biostatistics, Vanderbilt University
f.harrell@vanderbilt.edu

### See Also

`par`, `mtext`, `title`, `unix`, `pstamp`

### 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")

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