[R] plot3d with more than 8 colors

[Duncan Murdoch]

On 10/22/2007 9:54 AM, Birgit Lemcke wrote:
> Hello R user and helper!
> 
> I would like to get a 3d plot with coloured points.
> 
> I did that:
> 
> colors<-c(rep("2",7), rep("3",12), rep("4", 24), rep("5", 13), rep 
> ("6", 8), rep("7", 51), rep("8", 1), rep("9", 15), rep("10", 53), rep 
> ("11",3), rep("12",3), rep("13", 8), rep("14", 90), rep("15", 8), rep 
> ("16", 9), rep("17", 32), rep("18",11))
> 
> PCoA<-cmdscale(Dist.Gower, k = 3)
> plot3d(PCoA, type="s",col= colors, size=0.5)

plot3d is not in base R.  There are several contributed packages that 
have functions with that name:  rgl, compositions, etc.  Saying which 
one you want might help.

However, in general colours in R can be specified as character strings 
giving names or RGB levels, so you could probably use those.  Something 
  like terrain.colors(n) will give you a vector of n different colors, 
and its man page has lots of other colour sequences and links to other 
ways of creating colours.

> but I get only different colors for the numbers 1 to 8 and after that  
> it starts again with the first colour black.
> 
> How can get more different colours?
> 
> And two further questions: how can I ad a legend to the 3d-plot and  
> is there now a possibility to export movable 3d files?

That depends on the package.  rgl currently has no legend capability. It 
can export movies, but not anything the user could control.  Both of 
those would be nice additions, but both are fairly hard work, so they 
probably won't come very soon.

Duncan Murdoch

> Thanks in advance for your help.
> 
> Greetings
> 
> Birgit
> 
> 
> 
> 
> Birgit Lemcke
> Institut für Systematische Botanik
> Zollikerstrasse 107
> CH-8008 Zürich
> Switzerland
> Ph: +41 (0)44 634 8351
> birgit.lemcke at systbot.uzh.ch
> 
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