[R] Using pch with the RGL library

[Duncan Murdoch]

On 05/04/2010 2:27 PM, Iuri Gavronski wrote:
> Hi,
>
> I am trying to compare two 3D plots. For that, I am trying to use the
> "pch" parameter in the "points3d" function, but it is not working. Is
> it implemented? Any suggestion?
>   

Try reading the help page for points3d.  There is no "pch" mentioned.  
You can plot different characters using text3d, but the list of symbols 
that plot shows with numerical pch values just don't exist in rgl.

Duncan Murdoch
> Here goes a reproducible code. I wanted the second plot having
> different symbols for the points.
>
> x <- rbind(matrix(rnorm(100, sd = 0.3), ncol = 2),
>            matrix(rnorm(100, mean = 1, sd = 0.3), ncol = 2),
>            matrix(rnorm(100, mean = 2, sd = 0.3), ncol = 2))
> colnames(x) <- c("x", "y", "z")
> k1<-kmeans(x,3)
> k2<-kmeans(x,3,algorithm = "Lloyd")
> library(rgl)
> plot3d(x,col=k1$cluster)
> points3d(x+.02,pch=8,col=k2$cluster)
>
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