[R] ploting 2 variables in a lattice xyplot

[Ernesto Jardim]

On Tue, 2003-09-09 at 16:35, Douglas Bates wrote:
> Ernesto Jardim <ernesto at ipimar.pt> writes:
> 
> > Hi,
> > 
> > I want to plot 2 variables (confidence intervals) in a single xyplot. I
> > have a dataframe with variables Yup, Ylo, X and Z and I want to have a
> > xyplot with both variables ploted. I'm trying with 
> > 
> > xyplot(Yup~X|Z, panel=function(x){...})
> > 
> > but this way I'm not able to pass variable Ylo into the function...
> > 
> > How can I do this ?
> 
> According to the "formula" description on the manual page for xyplot
> you can use
> 
> xyplot(Ylo+Yup~X|Z, allow.multiple=TRUE)
> 
> Did you try that?

No, I allways forget formula as two sides :)

I'll try it.

Thanks 

EJ