[R] common title for graphs in a (1x2) layout

[Chuck Cleland]

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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Chuck Cleland, Ph.D.
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