Untitled

s <- c(68,85,74,88,63,78,90,80,58,63)
m <- c(85,91,74,100,82,84,78,100,51,70)
##畫圖
plot(s, m,
     pch = 19,
     col = "blue")

hist(s,freq = FALSE,    
     main = "統計直方圖",
     xlab = "統計成績",ylab="次數")

# Load ggplot2
library(ggplot2)

# Create data
data <- data.frame(
  name=c("娛樂休閒","知識閱讀","體育競技","科學創新","公益活動") ,  
  value=c(185,82,36,28,25)
  )

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

# Create Data
Prop <-c(185,82,36,28,25)
 
# Make the default Pie Plot
pie(Prop , labels = c("娛樂休閒","知識閱讀","體育競技","科學創新","公益活動"))

# Libraries
library(ggplot2)

# Create data

# Plot
ggplot(data, aes(x=name, y=value)) +
  geom_point() + 
  geom_segment( aes(x=name, xend=name, y=0
                    , yend=value))

data2 <- read.csv("D:/table.csv")

#平均數 總合除個數 
mean(data2$Japanese) 

## [1] 67.9

#中位數:將資料由小到大，位置居中者，就是中位數  
median(data2$Japanese) 

## [1] 62

#標準差  
sd(data2$Japanese)  

## [1] 16.25115

#變異數 
var(data2$Japanese)

## [1] 264.1

sd(data2$Japanese)  

## [1] 16.25115

summary(data2)

##      Name             Statistic          Math          Japanese    
##  Length:10          Min.   :58.00   Min.   : 51.0   Min.   :49.00  
##  Class :character   1st Qu.:64.25   1st Qu.: 75.0   1st Qu.:54.50  
##  Mode  :character   Median :76.00   Median : 83.0   Median :62.00  
##                     Mean   :74.70   Mean   : 81.5   Mean   :67.90  
##                     3rd Qu.:83.75   3rd Qu.: 89.5   3rd Qu.:82.75  
##                     Max.   :90.00   Max.   :100.0   Max.   :91.00  
##    Management      Accounting  
##  Min.   :60.00   Min.   :60.0  
##  1st Qu.:72.25   1st Qu.:66.0  
##  Median :77.00   Median :69.5  
##  Mean   :77.50   Mean   :73.0  
##  3rd Qu.:83.75   3rd Qu.:81.5  
##  Max.   :91.00   Max.   :86.0