[R] Change the limits of a plot "a posteriori"

[Greg Snow]

The zoomplot function in the TeachingDemos package can be used for this (it actually redoes the entire plot, but with new limits).  This will generally work for a quick exploration, but for quality plots it is suggested to create the 1st plot with the correct range to begin with.

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of jcano
> Sent: Thursday, December 01, 2011 11:12 AM
> To: r-help at r-project.org
> Subject: [R] Change the limits of a plot "a posteriori"
> 
> Hi all
> 
> How can I change the limits (xlim or ylim) in a plot that has been
> already
> created?
> 
> For example, consider this naive example
> curve(dbeta(x,2,4))
> curve(dbeta(x,8,13),add=T,col=2)
> 
> When adding the second curve, it goes off the original limits computed
> by R
> for the first graph, which are roughly, c(0,2.1)
> 
> I know two obvious solutions for this, which are:
> 1) passing a sufficiently large parameter e.g. ylim=c(0,4) to the first
> graphic
> curve(dbeta(x,2,4),ylim=c(0,4))
> curve(dbeta(x,8,13),add=T,col=2)
> 
> or
> 
> 2) switch the order in which I plot the curves
> curve(dbeta(x,8,13),col=2)
> curve(dbeta(x,2,4),add=T)
> 
> but I guess if there is any way of adjusting the limits of the graphic
> "a
> posteriori", once you have a plot with the undesired limits, forcing R
> to
> redraw it with the new limits, but without having to execute again the
> "curve" commands
> 
> Hope I made myself clear
> 
> Best regards and thank you very much in advance
> 
> 
> --
> View this message in context: http://r.789695.n4.nabble.com/Change-the-
> limits-of-a-plot-a-posteriori-tp4129750p4129750.html
> Sent from the R help mailing list archive at Nabble.com.
> 
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