readxl (1)

Introduction to Importing Data in R

Filip Schouwenaars

Instructor, DataCamp

Microsoft Excel

  • Běžný nástroj pro analýzu dat
  • Mnoho R balíčků pro práci s Excelem
  • readxl – Hadley Wickham
Introduction to Importing Data in R

Typická struktura dat v Excelu

  • Různé listy s tabulkovými daty

Snímek obrazovky Excelu s více listy

Introduction to Importing Data in R

readxl

  • excel_sheets()
    • vypíše jednotlivé listy
  • read_excel()
    • importuje data do R
install.packages("readxl")
library(readxl)
Introduction to Importing Data in R

excel_sheets()

dir()

"cities.xlsx"  "the_rest_is_secret.txt"

excel_sheets("cities.xlsx")

"year_1990" "year_2000"
Introduction to Importing Data in R

read_excel()

read_excel("cities.xlsx")

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

read_excel("cities.xlsx", sheet = 2)
read_excel("cities.xlsx", sheet = "year_2000")

# A tibble: 4 × 2
    Capital Population
      <chr>      <dbl>
1  New York   17800000
2    Berlin    3382169
3    Madrid    2938723
4 Stockholm    1942362
Introduction to Importing Data in R

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Introduction to Importing Data in R

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