import_data {lehuynh}

Import multiple files of the same format

Description

This function imports multiple data files of the same format from a specified directory, optionally filtered by a pattern in the filenames.

Usage

import_data(path, file_format, pattern = NULL, ...)

Arguments

path

A character string specifying the directory path where the data files are located.

file_format

A character string specifying the type of files to import, using a glob pattern (e.g., "*.csv" for CSV files).

pattern

An optional character string specifying a regex pattern to filter filenames. Default is NULL.

...

Additional arguments passed to the rio::import() function.

Value

A named list where each element is the imported data from a file, with names corresponding to the filenames without the path and file extension.

Examples

## For demo, temp. file paths is created with the file extension .csv
csv_file1 <- tempfile(pattern = "test", fileext = ".csv")
csv_file2 <- tempfile(pattern = "file", fileext = ".csv")
csv_file3 <- tempfile(pattern = "test", fileext = ".csv")

## create CSV files to import
write.csv(head(cars), csv_file1)
write.csv(head(mtcars), csv_file2)
write.csv(head(iris), csv_file3)

## Import all CSV files in the directory
data_list <- import_data(path = tempdir(), file_format = "*.csv")

## Import all CSV files with names containing "test"
data_list <- import_data(path = tempdir(), file_format = "*.csv", pattern = "test")