Kiki

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

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


mean(age) #平均數   

## [1] 55

median(age)#中位數

## [1] 55

Q1 <- quantile(age, 1 / 4) 
Q2 <- quantile(age, 2 / 4)
Q3 <- quantile(age, 3 / 4)

Q1

## 25% 
##  51

Q2

## 50% 
##  55

plot(age,high,
     pch=17,
     col="blue",
     xlab="年齡",
     ylab="身高",
     main="班級的年齡身高")

hist(age,
     col= "lightyellow",
     main ="班上的年齡與人數",
     xlab ="年齡",
     ylab ="人數")

library(ggplot2)

# Create data
data <- data.frame(
  name=c("珍奶","多多綠","冰淇淋紅茶") ,  
  value=c(3,12,5)
  )

# Barplot
ggplot(data, aes(x=name, y=value)) + 
  geom_bar(stat = "identity", width=0.2) 

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)))