[R] Using panel.grid in barchart

[David Winsemius]

On Feb 7, 2009, at 8:05 PM, Christopher Jones wrote:

> Hi all,
>
> I'm trying to do an example in Deepayan Sarkar's Lattice book.  It  
> involves making a barchart based on the Titanic dataset.  I can get  
> the barchart to plot fine; however, when I try to edit panel.grid, I  
> get an error:
>
> > titan<-barchart(Class ~ Freq | Age + Sex, data =  
> as.data.frame(Titanic), groups=Survived, stack=TRUE, layout=c(4,1),  
> auto.key=list(title="Survived", columns=2), scales=list(x="free"))
> > titan     <--- this plot is fine
> > update(titan, panel = function(...) { panel.barchart(...)})  <--- 
> same thing; also fine
> > update(titan, panel = function(...) { panel.grid(h = 0,v = -1)  
> panel.barchart(...)})

Scanning that line makes me wonder if you are forgetting to separate  
the individual panel calls with the appropriate separator (";").

>
> Error: syntax error
>
> Any advice?  I'm using R 2.8.1 on OS X Leopard if it helps.

My advice would be to spend a bit more time articulating your goals.

-- 
David Winsemius

>
>
> Thanks,
> Chris Jones
> c_jones at mit.edu
>
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