[R] Stacked plots with common x-axis and different y-axis

[Jason Rupert]

Gabor, 

Thanks a ton for your insights. 

Two questions - Here is the code I tried to run:
z <- with(airquality, zoo(cbind(Wind, Temp), Month + (Day - 1)/31))
plot(z,
     ylab=c("Wind  (mph)", "Temp (Deg F)"), col=c("royalblue1", "red3"), 
     xlab = c("Month Index", col="dark red"))

grid()

The grid does not appear to fit within the x-axis and y-axis limits, and also the Month Index text appears to be corrupted.  

Is there a way to fix this?

Thanks again for the insights. 




--- On Wed, 8/5/09, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:

> From: Gabor Grothendieck <ggrothendieck at gmail.com>
> Subject: Re: [R] Stacked plots with common x-axis and different y-axis
> To: "Jason Rupert" <jasonkrupert at yahoo.com>
> Cc: R-help at r-project.org
> Date: Wednesday, August 5, 2009, 8:09 PM
> Try this:
> 
> library(zoo)
> # ignore the fact that months have different lengths
> z <- with(airquality, zoo(cbind(Wind, Temp), Month +
> (Day - 1)/31))
> plot(z) # each on separate plot stacked above each other
> plot(z, screen = 1) # both on same plot
> 
> library(lattice)
> xyplot(z)
> xyplot(z, screen = 1)
> 
> ?plot.zoo has examples of using two y axes on the same
> plot
> 
> 
> On Tue, Aug 4, 2009 at 5:33 PM, Jason Rupert<jasonkrupert at yahoo.com>
> wrote:
> > Is there a place that shows how to create two plots
> that are stacked on top of each other where they share a
> common x-axis scale, but have differnt y-axis scale?
> >
> > Say have the following data: airquality
> > Stack plot(airquality$Day, airquality$Wind) on top of
>  plot(airquality$Day, airquality$Temp).
> >
> > I am interested in stacking the two on top of each
> other with no seam, or plotting the two lines with two
> different y-axis scales on the same plot.
> >
> > Thanks for any feedback and insights.
> >
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> >
>