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#### Demo for an rgl Animation of Cobar Ore fitting
require(quantreg)
if(requireNamespace("interp")){
## Make sure the demo does not ``die'' when rgl is not available:
do.rgl <- interactive() && require(rgl)
data(CobarOre)
### Make an initial quite rough fit of the data
fit <- rqss(z ~ qss(cbind(x,y), lambda = .01, ndum = 100),
data = CobarOre)
dummies <- fit$qss[[1]]$dummies
zcol <- CobarOre$z
if(do.rgl) {
plot(fit, render = "rgl")
cat("Now orient the plot as needed:",
"Resize window,",
"mouse button 1 to change viewpoint,",
"mouse button 2 to zoom,",
"and hit return when ready",sep="\n")
scan()
rgl.bg(color="8")
} else {
if(!interactive()) pdf(file = "cobar-demo.pdf")
plot(fit)
}
for(i in 1:20) {
fname <- paste("cobar",i,".png",sep="")
lam <- 2*i/100
fit <- rqss(z ~ qss(cbind(x,y), lambda = lam, dummies = dummies),
data = CobarOre)
if(do.rgl) {
rgl.clear()
plot(fit, render = "rgl", zcol = zcol)
rgl.snapshot(fname)
} else {
plot(fit, zcol = zcol)
}
}
}
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