Nothing
bumpchart<-function(y,top.labels=colnames(y),labels=rep(rownames(y),2),
rank=TRUE,mar=c(2,8,5,8),pch=19,col=par("fg"),lty=1,lwd=1,arrows=FALSE,
...) {
if(missing(y)) stop("Usage: bumpchart(y,top.labels,labels,...)")
ydim<-dim(y)
if(is.null(ydim)) stop("y must be a matrix or data frame")
oldmar<-par("mar")
par(mar=mar)
if(rank) y<-apply(y,2,rank)
# to get things the right way round, reverse the order of everything
labels<-rev(labels)
pch=rev(pch)
col=rev(col)
lty=rev(lty)
lwd=rev(lwd)
y<-apply(y,2,rev)
if(arrows) {
matplot(t(y),ylab="",type="p",pch=pch,col=col,axes=FALSE)
for(row in 1:(ydim[2]-1))
p2p_arrows(rep(row,ydim[1]),y[,row],rep(row+1,ydim[1]),y[,row+1],
col=col,lty=lty,lwd=lwd,...)
}
else
matplot(t(y),ylab="",type="b",pch=pch,col=col,lty=lty,lwd=lwd,axes=FALSE,...)
par(xpd=TRUE)
xylim<-par("usr")
minspacing<-strheight("M")*1.5
text(1:ydim[2],xylim[4]+(xylim[4]-xylim[3])/20,top.labels)
labelpos<-spreadout(y[,1],minspacing)
text(xylim[1],labelpos,labels[1:ydim[1]],adj=1)
labelpos<-spreadout(y[,ydim[2]],minspacing)
text(xylim[2],labelpos,labels[(ydim[1]+1):(2*ydim[1])],adj=0)
par(mar=oldmar,xpd=FALSE)
}
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