Hi all,
A few days ago I offered a suggestion on how to display the initial
values that were cut into a factor as a waffle plot. As Rolf Turner
noted, a major problem for users would be constructing the matrix that
was fed to the color2D.matplot function. Here is a fairly general
purpose function for that with an example from the initial post.
egdat <- c(137,135,144,149,150,152,159,157,154,163,164,164,
161,162,165,164,179,173,173,182,180,185,180,197,190)
cut2matrix<-function(x,breaks,ncol,nrow,right=TRUE) {
xcut<-as.numeric(cut(x,breaks=breaks,right=right))
if(missing(ncol)) ncol<-length(breaks)-1
if(missing(nrow)) nrow<-max(table(xcut))
xlist<-vector("list",ncol)
for(xind in 1:ncol) xlist[[xind]]<-rev(x[xcut==xind])
xdf<-as.data.frame(lapply(xlist,function(x) x[1:nrow]))
names(xdf)<-paste("V",1:ncol,sep="")
return(as.matrix(sapply(xdf,rev)))
}
egmat<-cut2matrix(egdat,seq(120,210,by=10),9,8,FALSE)
library(plotrix)
color2D.matplot(egmat,show.values=TRUE)
Jim
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