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TidierOrg/TidierFiles.jl: Tidier file reading and writing in Julia, modeled after the readr, haven, readxl, and writexl R packages.

TidierFiles.jl is a 100% Julia implementation of the readr, haven, readxl, and writexl R packages.

Powered by the CSV.jl, XLSX.jl, ReadStatTables.jl, Arrow.jl, and Parquet2.jl packages, TidierFiles.jl aims to bring a consistent interface to the reading and writing of tabular data, including a consistent syntax to read files locally versus from the web and consistent keyword arguments across data formats.

Currently supported file types:

• read_csv and write_csv
• read_tsv and write_tsv
• read_xlsx and write_xlsx
• read_delim and write_delim
• read_table and write_table
• read_fwf and fwf_empty
• read_sav and write_sav (.sav and .por)
• read_sas and write_sas (.sas7bdat and .xpt)
• read_dta and write_dta (.dta)
• read_arrow and write_arrow
• read_parquet and write_parquet
• read_json and write_json
• read_rdata (.rdata and .rds)
• read_gsheet and write_gsheet (Google Sheets)
• read_json and write_json

Agnostic read and write functions that detect the type and dispatch the appropriate function.

• read_file and write_file

list_files to list files in a directory.

Here is an example of how to write and read a CSV file.

using TidierFiles

df = DataFrame(
       integers = [1, 2, 3, 4],
       strings = ["This", "Package makes", "File reading/writing", "even smoother"],
       floats = [10.2, 20.3, 30.4, 40.5],
       dates = [Date(2018,2,20), Date(2018,2,21), Date(2018,2,22), Date(2018,2,23)],
       times = [Dates.Time(19,10), Dates.Time(19,20), Dates.Time(19,30), Dates.Time(19,40)]
     )

write_csv(df, "testing.csv" , col_names = true)

read_csv("testing.csv", missingstring=["40.5", "10.2"])

4×5 DataFrame
 Row │ integers  strings               floats     dates       times    
     │ Int64     String31              Float64?   Date        Time     
─────┼─────────────────────────────────────────────────────────────────
   1 │        1  This                  missing    2018-02-20  19:10:00
   2 │        2  Package makes              20.3  2018-02-21  19:20:00
   3 │        3  File reading/writing       30.4  2018-02-22  19:30:00
   4 │        4  even smoother         missing    2018-02-23  19:40:00:00

The file reading functions include the following keyword arguments:

• path
• missing_value
• col_names
• col_select
• num_threads
• skip
• n_max
• delim (where applicable)

The path can be a file available either locally or on the web.

read_csv("https://raw.githubusercontent.com/TidierOrg/TidierFiles.jl/main/testing_files/csvtest.csv", skip = 2, n_max = 3, col_select = ["ID", "Score"], missingstring = ["4"])

3×2 DataFrame
 Row │ ID       Score 
     │ Int64?   Int64 
─────┼────────────────
   1 │       3     77
   2 │ missing     85
   3 │       5     95

Read multiple files by passing paths as a vector.

path = "https://raw.githubusercontent.com/TidierOrg/TidierFiles.jl/main/testing_files/csvtest.csv"
read_csv([path, path], skip=3)

4×3 DataFrame
 Row │ ID     Name     Score 
     │ Int64  String7  Int64 
─────┼───────────────────────
   1 │     4  David       85
   2 │     5  Eva         95
   3 │     4  David       85
   4 │     5  Eva         95

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