#0315上課資料
#install.packages("readr")#第一次使用需安裝
library(readr)#用library呼叫套件
## Warning: 套件 'readr' 是用 R 版本 4.2.3 來建造的
#讀取資料,命名為"x"
x <- read.csv("favorite.csv", stringsAsFactors = TRUE)
#查看資料結構
summary(x)
## Favorite.Color Favorite.Music.Genre Favorite.Beverage
## Cool :37 Electronic : 8 Beer :13
## Neutral: 7 Folk/Traditional: 4 Doesn't drink:14
## Warm :22 Hip hop : 8 Other :11
## Jazz/Blues : 4 Vodka : 9
## Pop :17 Whiskey : 9
## R&B and soul : 6 Wine :10
## Rock :19
## Favorite.Soft.Drink Gender
## 7UP/Sprite :13 F:33
## Coca Cola/Pepsi:32 M:33
## Fanta :14
## Other : 7
##
##
##
#重新命名欄位名稱
colnames(x) #檢視欄位名稱
## [1] "Favorite.Color" "Favorite.Music.Genre" "Favorite.Beverage"
## [4] "Favorite.Soft.Drink" "Gender"
colnames(x) <- c("color", "music", "beverage", "drink", "gender")
###類別資料分析###
#問題:男女生各有多少人?
table(x$gender)#算次數
##
## F M
## 33 33
prop.table(table(x$gender))#算百分比
##
## F M
## 0.5 0.5
#問題:最喜歡的color、music、beverage、 drink、gender?
table(x$music)
##
## Electronic Folk/Traditional Hip hop Jazz/Blues
## 8 4 8 4
## Pop R&B and soul Rock
## 17 6 19
prop.table(table(x$music))
##
## Electronic Folk/Traditional Hip hop Jazz/Blues
## 0.12121212 0.06060606 0.12121212 0.06060606
## Pop R&B and soul Rock
## 0.25757576 0.09090909 0.28787879
#問題:男女對顏色的喜好的差異?
#次數分配表
t <- table(x$gender,x$color)
t
##
## Cool Neutral Warm
## F 17 3 13
## M 20 4 9
#百分比次數分配表
p.t <- proportions(t)
p.t
##
## Cool Neutral Warm
## F 0.25757576 0.04545455 0.19696970
## M 0.30303030 0.06060606 0.13636364
#將次數變成百分比(乘以100)
p.t <- p.t*100
p.t
##
## Cool Neutral Warm
## F 25.757576 4.545455 19.696970
## M 30.303030 6.060606 13.636364
#四捨五入至小數2位
p.t<- round(p.t,2)
s <- table(x$gender,x$music)
s
##
## Electronic Folk/Traditional Hip hop Jazz/Blues Pop R&B and soul Rock
## F 2 2 1 3 13 2 10
## M 6 2 7 1 4 4 9
p.t <- proportions(p.t,2)
p.t
##
## Cool Neutral Warm
## F 0.4595077 0.4288407 0.5908818
## M 0.5404923 0.5711593 0.4091182
p.t<- round(p.t,2)
p.t<- p.t*100
p.t
##
## Cool Neutral Warm
## F 46 43 59
## M 54 57 41
#畫長條圖
barplot(p.t)

#畫分組長條圖
barplot(p.t, beside = TRUE )

#加上圖例與上色
rownames(p.t)
## [1] "F" "M"
label <- rownames(p.t)
label
## [1] "F" "M"
barplot(p.t,
beside =TRUE ,
legend.text = label ,
col = c("pink","purple") )

#畫圓餅圖(畫兩個圖餅圖分別呈現男性與女性的某項喜好)
p.t
##
## Cool Neutral Warm
## F 46 43 59
## M 54 57 41
f <- p.t[1, ] # 取出女性資料
m <- p.t[2, ] # 取出男性資料
f
## Cool Neutral Warm
## 46 43 59
m
## Cool Neutral Warm
## 54 57 41
# par()是圖形控制函數,表示建立一個1x2的空間,用來呈現後續的圖
#par(mfrow = c(1,2) )
pie(f, main = "男生" )

pie(m, main = "女生" )

#dev.off() #離開par()
#畫圓餅圖並加上資料標籤
p.t
##
## Cool Neutral Warm
## F 46 43 59
## M 54 57 41
pie_category <- colnames(p.t)
f_label <- paste(pie_category, f,"%", sep = "")
f_label
## [1] "Cool46%" "Neutral43%" "Warm59%"
m_label <- paste(pie_category, m,"%", sep = "")
m_label
## [1] "Cool54%" "Neutral57%" "Warm41%"
#ar()# c(1,2),表示建立一個1x2的空間,用來呈現後續的圖
pie(f, labels = f_label, main = "Female")

pie(m, labels = m_label, main = "Male" )

#dev.off() #離開par()