Chapter 10 Lollipop Plot

Lollipop plot is basically a barplot, where the bar is transformed in a line and a dot. It shows the relationship between a numeric and a categorical variable. A lollipop is built using geom_point() for the circle, and geom_segment() for the stem.

Consider uspopchange data from gcookbook package.

uspopchange <- gcookbook::uspopchange
t = table(uspopchange$Region)
df = data.frame(t)
df

##            Var1 Freq
## 1     Northeast    9
## 2         South   16
## 3 North Central   12
## 4          West   13

ggplot(df,aes(x=Var1,y=Freq)) +geom_point() + geom_segment(aes(x=Var1, xend=Var1, y=0, yend=Freq))

ggplot(df,aes(x=Var1,y=Freq)) +geom_point(size=5, color="red", fill="yellow", alpha=0.7, shape=21, stroke=2) +geom_segment(aes(x=Var1, xend=Var1, y=0, yend=Freq))+labs(title="Lollipop Plot of Region",x="Region",y="Frequency")