Nothing
slider.density<-function(x,panel=rug,...)
{
x.name<-deparse(substitute(x))
if(missing(x)||length(x)<2) return("Error: x must be a vector")
args<-list(...)
if(!any("main"==names(args))) args<-c(args,list(main=x.name))
kernel<-c("gaussian", "epanechnikov","rectangular",
"triangular","biweight", "cosine", "optcosine")
slider(obj.name="kno",obj.value=1)
refresh<-function(...){
width<-slider(no=1)*diff(range(x))/100
kno<-slider(obj.name="kno"); kernel<-kernel[kno]
xy<-density(x,width=width,kernel=kernel)
do.call("plot",c(alist(x=xy),args))
title(paste("\n\nwidth =",signif(width,4),", kernel =",kernel))
panel(x)
}
set.kernel<-function(...){
kernel<-slider(no=2)
slider(obj.name="kno",obj.value=kernel)
refresh()
}
bw.default<-diff(range(x))/density(x)$bw
nt <- slider(c(refresh,set.kernel),
c("width (% of range)","kernel"),
c(.1,1),c(100,7),c(.1,1),c(bw.default,1)
)
# tkwm.minsize(nt, "300", "110") # set width, height to prevent to small sizes
refresh()
cat("use slider to select width of window and to select kernel:\n")
print(cbind("no"=1:7,"kernel"=kernel))
}
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