[R] add reference lines (or grid) in background

[John Kane]

Not sure if it is quite the same but ggplot2 does this as its default formatting.

library(ggplot2)
x<-rnorm(100)
qplot(factor(0),x, geom="boxplot")

John Kane
Kingston ON Canada


> -----Original Message-----
> From: marongiu.luigi at gmail.com
> Sent: Tue, 18 Sep 2012 09:35:47 +0100
> To: r-help at r-project.org
> Subject: [R] add reference lines (or grid) in background
> 
> Dear all,
> 
> Is there a simple way to add reference lines in background? I am trying
> with
> abline() or grid() but the lines, since they are executed after the plot
> function, are draw on top. How can I draw such lines beneath the main
> plot?
> Here is an example:
> 
> 
> 
> x<-rnorm(100)
> 
> boxplot(x)
> 
> abline(h=c(-1,0,1))
> 
> grid(NA, 4, lwd = 2)
> 
> 
> 
> regards,
> 
> 
> 
> Luigi Marongiu, MSc
> 
> 
> 
> 
> 	[[alternative HTML version deleted]]
> 
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