R help - Sep 2012 - [Re] add reference lines (or grid) in background

Dear Luigi,

Here's an option:

boxplot(x, boxcol="white",
whiskcol="white",medcol="white",staplecol="white")
abline(h=c(-1,0,1))
grid(NA, 4, lwd = 2)
boxplot(x,add=T)

Regards,

Jos? Iparraguirre



-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Luigi
Sent: 18 September 2012 09:36
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

 


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