際際滷

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Data Designer
Class 06
Data Wrangling
蠖蠑碁一危磯企 讀2
Data Wrangling
蠖蠑碁一危磯企 讀2
Data Wrangling
the process of manually converting or mapping data
from one "raw" form into another format
that allows for more convenient consumption of the data
蠖蠑碁一危磯企 讀2
企  一危郁 蟾
蠖蠑碁一危磯企 讀2
Wide format vs Long format
hour03 hour09 hour15 hour21
螳襴 25.5 26.2 29.3 26
蟯譯 25.5 27.9 33.4 27.6
蟲 27.3 29.5 36.1 30.7
 26.1 28.9 33.3 28.4
覿 25.3 28 29.8 25.6
 26.1 26.8 31.1 27.9
語 25.7 25.8 28.4 26.2
譯 26.8 28.6 29.9 26.8
豢豌 23.8 23.6 32 26.2
 28.9 27.1 34.3 31.7
企 24.4 27.4 29.5 26.2
location hour temp
螳襴 hour03 25.5
蟯譯 hour03 25.5
蟲 hour03 27.3
 hour03 26.1
覿 hour03 25.3
 hour03 26.1
語 hour03 25.7
譯 hour03 26.8
豢豌 hour03 23.8
 hour03 28.9
企 hour03 24.4
螳襴 hour09 26.2
蠖蠑碁一危磯企 讀2
Wide format
hour03 hour09 hour15 hour21
螳襴 25.5 26.2 29.3 26
蟯譯 25.5 27.9 33.4 27.6
蟲 27.3 29.5 36.1 30.7
 26.1 28.9 33.3 28.4
覿 25.3 28 29.8 25.6
 26.1 26.8 31.1 27.9
語 25.7 25.8 28.4 26.2
譯 26.8 28.6 29.9 26.8
豢豌 23.8 23.6 32 26.2
 28.9 27.1 34.3 31.7
企 24.4 27.4 29.5 26.2
-  朱企 煙 牛伎 襴 
- 覲願 煙 譯 煙
-  螻糾 朱 覲 覦一
- 覲襯 豢螳蠍 企給
- れ 襦 覲仰蠍 る
蠖蠑碁一危磯企 讀2
Long format (tidy data)
-  覲螳  伎 谿讌
- るジ  一危磯 覲仰蠍 暑
- 螳, 覈碁 ク
- 一危磯ゼ 讌 覲企伎 誤蠍磯 る
- 一危一 覿手 貉れ
location hour temp
螳襴 hour03 25.5
蟯譯 hour03 25.5
蟲 hour03 27.3
 hour03 26.1
覿 hour03 25.3
 hour03 26.1
語 hour03 25.7
譯 hour03 26.8
豢豌 hour03 23.8
 hour03 28.9
企 hour03 24.4
螳襴 hour09 26.2
蠖蠑碁一危磯企 讀2
Tidy Data
蠖蠑碁一危磯企 讀2
Tidy data
- 螳 覲  伎 蟲燕
- 螳 蟯豸′   蟲燕
-  企
狩 蟯豸′ 伎 讌 一危郁 願襖
蠖蠑碁一危磯企 讀2
location hour temp
螳襴 hour03 25.5
蟯譯 hour03 25.5
蟲 hour03 27.3
 hour03 26.1
覿 hour03 25.3
 hour03 26.1
語 hour03 25.7
譯 hour03 26.8
豢豌 hour03 23.8
 hour03 28.9
企 hour03 24.4
螳襴 hour09 26.2
Tidy data
覲
蟯豸′
蠖蠑碁一危磯企 讀2
Tidy data
movieNm cnt date week weeklyRank
aaa 100 2015-08-01 1 3
aaa 120 2015-08-08 2 3
aaa 240 2015-08-15 3 3
aaa 300 2015-08-22 4 2
bbb 200 2015-08-01 1 2
bbb 250 2015-08-08 2 2
bbb 300 2015-08-15 3 2
bbb 350 2015-08-22 4 1
ccc 700 2015-08-01 1 1
ccc 550 2015-08-08 2 1
ccc 320 2015-08-15 3 1
ccc 280 2015-08-22 4 3
 朱 蟯螳 譯手 螳  企 螳企慨
蠖蠑碁一危磯企 讀2
Tidy data
movieNm cnt date
aaa 100 2015-08-01
aaa 120 2015-08-08
aaa 240 2015-08-15
aaa 300 2015-08-22
bbb 200 2015-08-01
bbb 250 2015-08-08
bbb 300 2015-08-15
bbb 350 2015-08-22
ccc 700 2015-08-01
ccc 550 2015-08-08
ccc 320 2015-08-15
ccc 280 2015-08-22
movieNm week weeklyRank
aaa 1 3
bbb 1 2
ccc 1 1
aaa 2 3
bbb 2 2
ccc 2 1
aaa 3 3
bbb 3 2
ccc 3 1
aaa 4 2
bbb 4 1
ccc 4 3
 朱 蟯螳  譯手 
蟯豸1 蟯豸2
蠖蠑碁一危磯企 讀2
Tidy Data螳  伎
蠖蠑碁一危磯企 讀2
RAW DATA 覲1 覲2 覲3 覲4
螳1 螳2 螳3 螳4
蠖蠑碁一危磯企 讀2
RAW DATA TIDY DATA
螳1
螳2
螳3
螳4
蠖蠑碁一危磯企 讀2
Tidy Data襦 覲仰蠍
蠖蠑碁一危磯企 讀2
tidyr
install.packages('tidyr')
library(tidyr)
data.frame襷   .
るジ 襭 蟇磯  蟯覯  伎 reshape2 れ襯 伎
蠖蠑碁一危磯企 讀2
tidyr::gather()
weather_wide = read.csv('weather_wide.csv', fileEncoding='UTF-8')
weather_long = gather(weather_wide, hour, temp, hour03:hour21)
wide format -> long format
gather(data, key column name, value column name, range of key column)
location hour03 hour09 hour15 hour21
螳襴 25.5 26.2 29.3 26
蟯譯 25.5 27.9 33.4 27.6
蟲 27.3 29.5 36.1 30.7
 26.1 28.9 33.3 28.4
覿 25.3 28 29.8 25.6
... ... ... ... ...
location hour temp
螳襴 hour03 25.5
蟯譯 hour03 25.5
蟲 hour03 27.3
 hour03 26.1
覿 hour03 25.3
... ... ...
蠖蠑碁一危磯企 讀2
dplyr 伎 一危
蠖蠑碁一危磯企 讀2
dplyr
install.packages('dplyr')
library(dplyr)
data.frame襷   .
一危  伎語 れ 襭 る plyr れ襯 伎
蠖蠑碁一危磯企 讀2
dplyr::select()
- 讌 伎   
- 伎 企 覲蟆渚  
select(data, column_name)
select(data, new_name = column_name)
select(weather_long, location, temp)
select(weather_long, loc = location, temp)
蠖蠑碁一危磯企 讀2
dplyr::filter()
- 譟郁唄 讌伎  襷 豢ロ
- |一一襯 牛 OR一一   螻,
AND一一 譟郁唄 comma襦 伎 覿企 螳ロ
filter(data, column_name > value)
filter(weather_long, location == ' ')
filter(weather_long, location == ' ', temp > 26)
filter(weather_long, location == ' ' | location == ' ')
蠖蠑碁一危磯企 讀2
dplyr::mutate()
- 一一 牛 襦 伎 燕
-  伎 燕 企 覦襦 一一   
- 襯 讌覃 狩 螳朱 豈 伎 燕
mutate(data, new_column = value)
mutate(weather_long, mean_temp = mean(temp))
mutate(weather_long, mean_temp = mean(temp),
diff = temp - mean_temp)
mutate(weather_long, country = 'Korea')
蠖蠑碁一危磯企 讀2
select, filter, mutate れ
(C) (F)襦 覲る 螻旧
F = (9/5)*C + 32 手 
1) temp伎 螳 襦 覲蟆渚 temp_f 朱 伎 燕伎殊語
2)  螳 90襯  蟆曙磯 谿場 location螻 temp 企 豢ロ伎殊語
蠖蠑碁一危磯企 讀2
dplyr::summarise()
- 一危磯ゼ 渚伎
- group_by 蟷   
summarise(data, new_column = value)
summarise(weather_long, mean(temp))
summarise(weather_long, count = n())
蠖蠑碁一危磯企 讀2
dplyr::group_by()
- 一一 蠏碁9覲襦   襦  覲伎伎  蠏碁9 讌伎
- mutate, summarise 譟壱朱 
- 蠏碁9 讌 伎る ungroup() 
group_by(data, coloumn_name)
group_by(weather_long, location)
group_by(weather_long, hour)
蠖蠑碁一危磯企 讀2
dplyr::group_by()
- 一一 蠏碁9覲襦   襦  覲伎伎  蠏碁9 讌伎
- mutate, summarise 譟壱朱 
group_by(data, coloumn_name)
weather_loc = group_by(weather_long, location)
weather_hour = group_by(weather_long, hour)
summarise(weather_loc, mean_temp = mean(temp))
summarise(weather_hour, mean_temp = mean(temp))
mutate(weather_loc, mean_temp = mean(temp))
mutate(weather_hour, mean_temp = mean(temp))
蠖蠑碁一危磯企 讀2
location hour temp
螳襴 hour03 25.5
蟯譯 hour03 25.5
蟲 hour03 27.3
螳襴 hour09 26.2
蟯譯 hour09 27.9
蟲 hour09 29.5
螳襴 hour15 29.3
蟯譯 hour15 33.4
蟲 hour15 36.1
螳襴 hour21 26
蟯譯 hour21 27.6
蟲 hour21 30.7
location hour temp
螳襴 hour03 25.5
螳襴 hour09 26.2
螳襴 hour15 29.3
螳襴 hour21 26
蟯譯 hour03 25.5
蟯譯 hour09 27.9
蟯譯 hour15 33.4
蟯譯 hour21 27.6
蟲 hour03 27.3
蟲 hour09 29.5
蟲 hour15 36.1
蟲 hour21 30.7
蠖蠑碁一危磯企 讀2
dplyr::arrange()
- 讌 伎 蠍一朱 
- 伎  螳 伎 讌覃 豌 覯讌 伎 螳   襾語 伎 蠍一朱 
- 蠍磯蓋螳 る谿伎襷 desc()襯 伎伎 企殊姶    
- group_by レ 覦
arrange(data, coloumn_name)
arrange(data, desc(coloumn_name))
arrange(weather_long, desc(temp), hour)
summary_loc = summarise(weather_loc, mean_temp = mean(temp))
arrange(summary_loc, mean_temp)
arrange(summary_loc, desc(mean_temp))
蠖蠑碁一危磯企 讀2
れ
iris 一危磯ゼ 伎伎 譬(Species)覲襦
1) Sepal.Width 願骸 Sepal.Length 伎 蠏 蟲伎殊語
2) max(),min() 伎伎
螳 譬覲襦 Petal.Width 豕螳, 豕螳 蟲伎殊語
蠖蠑碁一危磯企 讀2
pipe operator
%>%
蠖蠑碁一危磯企 讀2
magrittr
蠖蠑碁一危磯企 讀2
%>%
f
%>% f
蠖蠑碁一危磯企 讀2
%>%
f(x, y, z) 
x %>% f(y, z)  螳
g(f(a, b), c) 
a %>% f(b) %>% g(c)  螳
蠖蠑碁一危磯企 讀2
%>%
summarise(group_by(weather_long, location),
mean_temp = mean(temp))
weather_long %>%
group_by(location) %>%
summarise(mean_temp = mean(temp))
  貊 螳
蠖蠑碁一危磯企 讀2
pipe襯 磯 伎
蠖蠑碁一危磯企 讀2
weather_long 一危磯ゼ
location 覲襯 蠍一朱 group_by伎
螳 讌覲襦  蠏 蟲螻
讌覲 蠏 豌 蠏 觝 螳 蟲伎
蠏 螳 0覲企  讌 蟲 れ
讌螻 蠏 螳襷
蠏   企殊姶朱 企慨
蠖蠑碁一危磯企 讀2
arrange(
select(
filter(
mutate(
summarise(
group_by(weather_long, location),
mean_temp = mean(temp)
),
diff = mean_temp - mean(mean_temp)
),
diff > 0
),
location, mean_temp
),
desc(mean_temp)
)
蠖蠑碁一危磯企 讀2
weather_01 = group_by(weather_long, location)
weather_02 = summarise(weather_01,
mean_temp = mean(temp))
weather_03 = mutate(weather_02,
diff = mean_temp - mean(mean_temp))
weather_04 = filter(weather_03, diff > 0)
weather_05 = select(weather_04, location, mean_temp)
weather_06 = arrange(weather_05, desc(mean_temp))
weather_06
蠖蠑碁一危磯企 讀2
weather_long %>%
group_by(location) %>%
summarise(mean_temp = mean(temp)) %>%
mutate(diff = mean_temp - mean(mean_temp)) %>%
filter(diff > 0) %>%
select(location, mean_temp) %>%
arrange(desc(mean_temp))
pipe襯 伎 襴覃 れ螻 螳
蠖蠑碁一危磯企 讀2
pipe襯 磯 伎
- 螳
- 覿  覲襯 譴  
- 螳 襦 貊襯 燕  
譯殊伎  
- pipe operator螳 れ伎 れ襯 覿
  
- pipe 襯 蠍  蟲譟一 覃
ろ 貊螳  覲旧″伎  
- pipe 一一襯 覈襯企  覲企 危危蠍 る
蠖蠑碁一危磯企 讀2
WELCOME TO
HADLEYVERSE
蠖蠑碁一危磯企 讀2
螻殊
- 蠖磯 1蠍 螳襭 れ牛企慨蠍
http://lumiamitie.github.io/r_tutorial/Datadesigner01_cleansing
- weather_wide_full.csv 一危
- tidy data襦 覲仰蠍
- 讌覲, 螳覲 蠏 蟲蠍
[week6]R_Wrangling

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