This is a sample document that I am creating with my students. The following is demographic data
x<-c(4,5,6,7)
y<-c(4,7,6,5)
plot(x,y)
age<-c(34,54,67, 52)
person<-c("Frank","Betty","Juan","Lisa")
sex<-c("M","F","M","F")
df<-data.frame(person,age,sex)
df$sex<-as.factor(df$sex)
df$smoking<-c("yes","no","no","yes")
df$smoking<-as.factor(df$smoking)
df
## person age sex smoking
## 1 Frank 34 M yes
## 2 Betty 54 F no
## 3 Juan 67 M no
## 4 Lisa 52 F yes