readxl（2）

R 資料匯入入門

Filip Schouwenaars

Instructor, DataCamp

read_excel()

read_excel(path, sheet = 1, 
           col_names = TRUE, 
           col_types = NULL, 
           skip = 0)

螢幕截圖 2019-07-15 3:27:34 PM.png

read_excel()－col_names

read_excel(path, sheet = 1, 
           col_names = TRUE, 
           col_types = NULL, 
           skip = 0)

col_names = FALSE：R 會自行指派欄名
col_names = 字元向量：手動指定欄名

read_excel()－col_types

read_excel(path, sheet = 1, 
           col_names = TRUE, 
           col_types = NULL, 
           skip = 0)

read_excel("cities.xlsx", col_types = c("text", "text"))

# A tibble: 4 × 2
    Capital Population
      <chr>      <chr>
1  New York   16044000
2    Berlin    3433695
3    Madrid    3010492
4 Stockholm    1683713

read_excel()－col_types

read_excel(path, sheet = 1, 
           col_names = TRUE, 
           col_types = NULL, 
           skip = 0)`

read_excel("cities.xlsx", 
             col_types = c("text", "blank"))

# A tibble: 4 × 1
    Capital
      <chr>
1  New York
2    Berlin
3    Madrid
4 Stockholm

read_excel()－skip

read_excel(path, sheet = 1, 
           col_names = TRUE, 
           col_types = NULL, 
           skip = 0)

read_excel("cities.xlsx", 
             col_names = c("Capital", "Population"),
             skip = 2)

# A tibble: 3 × 2
    Capital Population
      <chr>      <dbl>
1    Berlin    3433695
2    Madrid    3010492
3 Stockholm    1683713

總結

excel_sheets()
read_excel()
所需功能全都有！
速度快
與 readr 套件參數相同
一致性

一起來練習吧！

R 資料匯入入門