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https://stat.ethz.ch/pipermail/r-help/2009-March/193338.html

Perhaps it helps you...

On 03/08/2011 11:48 PM, Marius Hofert wrote:
Dear expeRts,

I would like to make a plot symbol in panel.3dscatter thicker. As you can see 
from
the minimal example below, the parameter "lwd" does not solve this problem.
What can I do to make the plot symbol thicker?

Cheers,

Marius



library(lattice)

x<- 1:10
y<- x
g<- expand.grid(x=x, y=y)
z<- apply(g, 1, function(z) log(z[1] + z[2]^2))
val<- cbind(g, z)
pts<- c(3,5,3.34)

wireframe(val[,3] ~ val[,1]*val[,2], pts=pts, xlab="x", ylab="y", zlab="z",
           panel.3d.wireframe = function(x,y,z,xlim,ylim,zlim,xlim.scaled,
           ylim.scaled,zlim.scaled,pts,...){
               panel.3dwire(x=x, y=y, z=z, xlim=xlim, ylim=ylim, zlim=zlim,
                            xlim.scaled=xlim.scaled, ylim.scaled=ylim.scaled,
                            zlim.scaled=zlim.scaled, ...)
               panel.3dscatter(x=pts[1], y=pts[2], z=pts[3],
                               xlim=xlim, ylim=ylim, zlim=zlim,
                               xlim.scaled=xlim.scaled, ylim.scaled=ylim.scaled,
                               zlim.scaled=zlim.scaled, type="p",
                               pch=3, lwd=10, cex=3, .scale=TRUE, ...)
           })

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