[R] different colors for two wireframes in same plot

[deepayan.sarkar at gmail.com]

On 9/27/07, marcg <mdgi at gmx.ch> wrote:
> Thanks a lot
>
> This already looks nice and I already checked the ?wireframe, but with no
> examples and as newcommer its hard to find out a correct code.
>
> If we set drape=F in the example:
>
> g <- expand.grid(x = 1:10, y = 5:15, gr = 1:2)
> g$z <- log((g$x^g$g + g$y^2) * g$gr)
> wireframe(z ~ x * y, data = g, groups = gr,
>           scales = list(arrows = FALSE),
>           drape = F, colorkey = TRUE,
>           screen = list(z = 30, x = -60))
>
> you get a two color pic of these layers - and what I'm actually looking for
> is making just the UPPER (toplayer) transparent.

Generally seaking, partially transparent colors can be specified in
the form "#RRGGBBAA" (it's hard to see where to document this in a way
that ``newcomers'' can find -- suggestions welcome). Using this:

wireframe(z ~ x * y, data = g, groups = gr,
          col.groups = c("#00FFFFFF", "#FF00FFAA"))

-Deepayan


>
> Thanks for further help
>
> marc
>
> -------- Original-Nachricht --------
> > Datum: Thu, 27 Sep 2007 11:29:19 +0200
> > Von: "Frede Aakmann Tøgersen" <FredeA.Togersen at agrsci.dk>
> > An: "marcg" <mdgi at gmx.ch>, r-help at stat.math.ethz.ch
> > Betreff: SV: [R] different colors for two wireframes in same plot
>
> > You can obtain some transparency setting the alpha transparency. This is
> > device dependent though. Using the pdf device you can do this obtaining
> > transparency of both surfaces (the version must be at least 1.4 for
> > semitransparent output to be understood):
> >
> >
> > pdf("test.pdf",version="1.4")
> > wireframe(z ~ x * y, data = g, groups = gr,
> >           scales = list(arrows = FALSE),
> >           drape = TRUE, colorkey = TRUE,
> >           screen = list(z = 30, x = -60),
> >           par.settings = list(regions=list(alpha=0.75)))
> > dev.off()
> >
> > See ?wireframe for the "at, col.regions, alpha.regions" arguments.
> >
> > Does this suffice?
> >
> >
> > Med venlig hilsen
> > Frede Aakmann Tøgersen
> >
> >
> >
> >
> > > -----Oprindelig meddelelse-----
> > > Fra: r-help-bounces at r-project.org
> > > [mailto:r-help-bounces at r-project.org] På vegne af marcg
> > > Sendt: 27. september 2007 09:22
> > > Til: r-help at stat.math.ethz.ch
> > > Emne: [R] different colors for two wireframes in same plot
> > >
> > > Hello R,
> > >
> > > According to:
> > >
> > > g <- expand.grid(x = 1:10, y = 5:15, gr = 1:2) g$z <-
> > > log((g$x^g$g + g$y^2) * g$gr) wireframe(z ~ x * y, data = g,
> > > groups = gr,
> > >           scales = list(arrows = FALSE),
> > >           drape = TRUE, colorkey = TRUE,
> > >           screen = list(z = 30, x = -60))
> > >
> > > i have two wireframes in one plot.
> > >
> > > How could i change the color of the top - one to transparent
> > > (or only the grid). I want to give insight to the lower layer.
> > >
> > > Could one make an if-statment like (if gr==1 do drape=F or
> > > color=none) if gr=2 do drape=T, colorkey=T)
> > >
> > > Thanks for your help
> > >
> > > Marc
> > >
> > > --
> > > Psssst! Schon vom neuen GMX MultiMessenger gehört?
> > > Der kanns mit allen: http://www.gmx.net/de/go/multimessenger
> > >
> > > ______________________________________________
> > > R-help at r-project.org mailing list
> > > 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 at r-project.org mailing list
> 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 at r-project.org mailing list
> 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.
>