## ----echo=FALSE,eval=FALSE----------------------------------------------------
# options(width=80)

## ----eval=FALSE---------------------------------------------------------------
# library(catdata)
# data(unemployment,package="catdata")

## ----fig.width=9,eval=FALSE---------------------------------------------------
# library(party)
# tree1<-ctree(as.factor(durbin)~age,data=unemployment)
# 
# plot(tree1)

## ----eval=FALSE---------------------------------------------------------------
# unemployment$durbin[unemployment$durbin==2]<-0
# year<- unemployment$age
# year [unemployment$age<29.5] <- 1
# year [unemployment$age>29.5 & unemployment$age<52.5] <- 2
# year [unemployment$age>52.5] <- 3
#  	
# pre3 <- mean(unemployment$durbin[year==3])
# pre2 <- mean(unemployment$durbin[year==2])
# pre1 <- mean(unemployment$durbin[year==1])
# 
# meanyear <- c()
# 
# for (i in min(unemployment$age):max(unemployment$age)){
# meanyear[i] <- sum(unemployment$durbin[unemployment$age==i])
# if(sum(unemployment$durbin[unemployment$age==i])!=0){
# meanyear[i] <- mean(unemployment$durbin[unemployment$age==i])
# }
# }
# 
# unemployment$means<- rep(2, nrow(unemployment))
# 
#  for (k in 1:nrow(unemployment)){
#  unemployment$means[k] <- meanyear[unemployment$age[k]]
#  }

## ----fig.width=9,eval=FALSE---------------------------------------------------
#   plot(unemployment$age, unemployment$means, xlab="age",ylab="",cex.axis=1.5,
#        cex.lab=1.5)
#  segments(x0=min(unemployment$age),x1=29.5,y0=pre1)
#  segments(x0=29.5,x1=29.5,y0=pre1,y1=pre2)
#  segments(x0=29.5,x1=52.5,y0=pre2)
#  segments(x0=52.5,x1=52.5,y0=pre2,y1=pre3)
#  segments(x0=52.5,x1=max(unemployment$age),y0=pre3)

## ----echo=FALSE,results='hide',eval=FALSE-------------------------------------
# detach(package:party)