Dear all,

Many thanks for your help, especially for RSiteSearch().

The problem was that I used mtext **before** the plots.
best regards
Rodrigo




---------- Forwarded message ----------
From: Chuck Cleland <ccleland@optonline.net>
Date: Feb 15, 2006 4:00 PM
Subject: Re: [R] common title for graphs in a (1x2) layout
To: Rodrigo Tsai <rodrigo.tsai@gmail.com>
Cc: R-help@stat.math.ethz.ch

Rodrigo Tsai wrote:
> Dear all,
>
> Many thanks for the help suggesting the use of "layout" cmd.
>
> How to insert a title in a 1x2 layout? The title is related to both
graphs.
> I looked for it in help, unsuccessfully.
>
> Thanks in advance,
> Rodrigo.
>
> my reproductible code:
> ----------------------------------------------------------------------
>
> def.par <- par(no.readonly = TRUE)
>
> nf <- layout(matrix(c(1,2), 1,2,byrow=T), c(1,1), c(1,1), T)
>
> layout.show(nf)
>
>
>
> plot(rnorm(10,0,1))
>
> plot(rnorm(10,0,0.1))
>
> par(def.par)
>
> ----------------------------------------------------------------------
>
>       [[alternative HTML version deleted]]

RSiteSearch("Overall Title")

def.par <- par(no.readonly = TRUE)

par(oma = c(0, 0, 3, 0))

nf <- layout(matrix(c(1,2), 1,2,byrow=T), c(1,1), c(1,1), T)

layout.show(nf)

plot(rnorm(10,0,1))

plot(rnorm(10,0,0.1))

mtext("Centered Overall Title", outer = TRUE)

par(def.par)

Or without layout(), something like this:

par(mfrow=c(1,2), oma=c(0,0,2,0))
plot(1:10)
plot(1:10)
title("Centered Overall Title", outer=TRUE)

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