[R] lattice question

[Bert Gunter]

It is unclear to me how you wish to define and distinguish groups.
Assuming you wish to have separate lines for the interaction as
Deepayan showed, but want the colors (or line types or both) to differ
only by by the "name" factor, then is this what you want?

trellis.par.set(superpose.line = list(lty = 1:6)) ## or other line
types you create
u.names <- unique(mydf.long$name)
xyplot(X ~ date, groups = interaction(name,G), data = mydf.long,
       type = c("l","g"),
       col.line = trellis.par.get("superpose.line")$col[
          seq_along(u.names)],
       lty =  trellis.par.get("superpose.line")$lty[
          seq_along(u.names)]
)

Notes:
1. If this is not what you want, I give up. Others may have better insight.
2. If this is what you want, Deepayan may be able to provide you a
nicer way to do it.
3. If you have more different names than 6 or 7, then you may have to
add more line types or colors to the superpose.line settings. Though I
would think the plot would be pretty much a mess, if so.

Bert


On Wed, Aug 10, 2022 at 4:57 PM Naresh Gurbuxani
<naresh_gurbuxani using hotmail.com> wrote:
>
> Actually I meant types (e.g., lty = 1:2).  But colors would also work.  But I do not want to specify these in call to xyplot().
>
> In my actual problem, there are more than two groups.  Moreover, the number of groups changes from case to case.  In my set up, I use trellis.par.set() to set line styles, colors, pch, etc.
>
> I would the call to xyplot() to automatically use the set options.
>
> Thanks,
> Naresh
>
> Sent from my iPhone
>
> > On Aug 10, 2022, at 5:40 PM, Bert Gunter <bgunter.4567 using gmail.com> wrote:
> >
> > I assume you mean two line colors, not types.
> > Like this?
> >
> > xyplot(X ~ date, groups = interaction(name,G), data = mydf.long,
> >       type = c("l", "g"), col.line = c("blue","red"))
> >
> >
> > Cheers,
> > Bert
> >
> >> On Wed, Aug 10, 2022 at 2:12 PM Naresh Gurbuxani
> >> <naresh_gurbuxani using hotmail.com> wrote:
> >>
> >> Deepayan,
> >>
> >> Thanks for providing a solution.  While this is close to my goal, I want one more change.  The line type (lty) should be the same for long and short.  The line type should only change according to “name” group.  So the the graph will have two line types (not four as in your solution).
> >>
> >> Is it possible?
> >>
> >> Thanks,
> >> Narrsh
> >>
> >> Sent from my iPhone
> >>
> >>>> On Aug 10, 2022, at 9:37 AM, Deepayan Sarkar <deepayan.sarkar using gmail.com> wrote:
> >>>
> >>> On Wed, Aug 10, 2022 at 4:53 PM Naresh Gurbuxani
> >>> <naresh_gurbuxani using hotmail.com> wrote:
> >>>>
> >>>>
> >>>> I want to merge two panels into one.  Is it possible to do this?
> >>>>
> >>>> Thanks,
> >>>> Naresh
> >>>>
> >>>> library(lattice)
> >>>> mydf <- data.frame(date = rep(seq.Date(as.Date("2022-08-01"), by = 1,
> >>>> length.out = 10), 2), name = c(rep("Aa", 10), rep("Bb", 10)),
> >>>> long = runif(20, 2, 10), short = runif(20, -10, 0))
> >>>>
> >>>> # This plots data in two panels.  I want all four lines in one panel.
> >>>> xyplot(long + short ~ date, groups = name, data = mydf, type = c("l",
> >>>> "g"))
> >>>
> >>> The "extended" formula API (with +) is really only meant as an
> >>> alternative to reshape() for simple cases. In your case, you probably
> >>> want something like
> >>>
> >>> mydf.long = reshape(mydf, direction = "long", varying = list(c("long",
> >>> "short")), v.names = "X", timevar = "G", times = c("long", "short"))
> >>>
> >>> xyplot(X ~ date, groups = interaction(name, G), data = mydf.long, type
> >>> = c("l", "g"))
> >>>
> >>> -Deepayan
> >>>
> >>>> # This does not work
> >>>> # No error in R session
> >>>> # Graph window says: "Error using packet 1
> >>>> # argument 'subscripts' is missing, with no default"
> >>>> xyplot(long ~ date, data = mydf, groups = name, type = c("l", "g"),
> >>>> panel = function(x, y, ..., subscripts) {
> >>>> panel.xyplot(x, y, ...)
> >>>> panel.xyplot(mydf$date[subscripts], mydf$short[subscripts], ...)})
> >>>>
> >>>> ______________________________________________
> >>>> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >>>> https://stat.ethz.ch/mailman/listinfo/r-help
> >>>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> >>>> and provide commented, minimal, self-contained, reproducible code.
> >> ______________________________________________
> >> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >> https://stat.ethz.ch/mailman/listinfo/r-help
> >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> >> and provide commented, minimal, self-contained, reproducible code.