Untitled

weight <- c(50,55,63,55,67,43,52)

high <- c(150,160,170,175,150,153,165)


mean(weight)   

## [1] 55

Q1 <- quantile(weight, 1 / 4) 
Q2 <- quantile(weight, 2 / 4) 

median(weight)

## [1] 55

Q1

## 25% 
##  51

Q2

## 50% 
##  55

plot(weight,high,
     pch=17,
     col="red",
     xlab="體重",
     ylab="身高",
     main="班級的身高體重")

hist(weight,
     col= "lightyellow",
     main ="班上的體重與身高",
     xlab ="體重",
     ylab ="次數")

library(ggplot2)

# Create data
data <- data.frame(
  name=c("A","B","C","D","E") ,  
  value=c(3,12,5,18,45)
  )

# Barplot
ggplot(data, aes(x=name, y=value)) + 
  geom_bar(stat = "identity") +
  coord_flip()

data<- c(50,23,35,48)
labels <- c("英文系","法文系","德文","翻譯")

pie(data,labels,main ="學生的比例", col=heat.colors(length(data)))