期中作業

Statistic<- c(68,85,74,88,63,78,90,80,58,63)

Math <- c(85,91,74,100,82,84,78,100,51,70)
plot(Statistic,Math,
     pch = 17,
     col= "skyblue",
     main ="成績表",
     xlab ="統計成績",
     ylab ="數學成績")

hist(Math,
     col= "lightyellow",
     main ="數學成績",
     xlab ="成績",
     ylab ="個數")

# Load ggplot2
library(ggplot2)
# Load ggplot2
library(ggplot2)

# Create data
data <- data.frame(
  name=c("休閒娛樂","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,  fill="skyblue") 

data<- c(185,82,36,28,25)
labels <- c("休閒娛樂","知識閱讀","體育競技","科學創新","公益活動")

pie(data,labels,main ="社團類型", col=heat.colors(length(data)))

labels <- c("休閒娛樂", "知識閱讀", "體育競技", "科學創新", "公益活動")
data <- c(185,82,36,28,25)
df <- data.frame(labels, data)


ggplot(df, aes(x = labels, y = data)) +
  geom_segment(aes(x = labels, xend = labels, y = 0, yend = data), color = "orange", size = 1.5) +
  geom_point(color = "red", size = 5) +
  theme_minimal() +
  labs(title = "社團類型", x = "社團類型", y = "人數")

## Warning: Using `size` aesthetic for lines was deprecated in ggplot2 3.4.0.
## ℹ Please use `linewidth` instead.
## This warning is displayed once every 8 hours.
## Call `lifecycle::last_lifecycle_warnings()` to see where this warning was
## generated.

Data <- read.csv("D:/table1_1.csv")

stem(Data$Japanese)

## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   4 | 9
##   5 | 139
##   6 | 13
##   7 | 9
##   8 | 49
##   9 | 1

mean(Data$Japanese)

## [1] 67.9

median(Data$Japanese)

## [1] 62

as.numeric(names(table(Data$Japanese)))[which.max(table(Data$Japanese))]

## [1] 49

sd(Data$Japanese)

## [1] 16.25115

var(Data$Japanese)

## [1] 264.1

quantile(Data$Japanese, 1/4)

##  25% 
## 54.5

quantile(Data$Japanese, 3/4)

##   75% 
## 82.75