Create patterns within a plot?

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Jim Lemon
Sent: Thursday, March 14, 2013 12:19
To: ?hagen Patrik
Cc: R hELP
Subject: Re: [R] Create patterns within a plot?

On 03/14/2013 09:19 PM, ?hagen Patrik wrote:

Please note that I want to use log-scale on the x-axis which makes the

polygon function sad.

Cheers, Patrik


-----Ursprungligt meddelande-----
Fr?n: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]

F?r ?hagen Patrik

Skickat: den 14 mars 2013 08:47
Till: R hELP
?mne: [R] Create patterns within a plot?



Dear All,

As an attempt to highlight the overall pattern in a Forest plot, I would

like to "highlight" the area around HR=1. I cannot find any simple tools
for painting a grey ribbon between 0.9 and 1.1. Any suggestions?

Hi Patrik,
This is a bit indirect, but it may do what you want. The example plot is
from the metafor package (see forest.default):

forest(dat$yi, dat$vi)
library(plotrix)
gradient.rect(0.9,-0.1,1.1,14,
  reds=c(1,0.5,1),greens=c(1,0.5,1),
  blues=c(1,0.5,1),gradient="x",border=NA)
par(new=TRUE)
forest(dat$yi, dat$vi)

Jim