read_lines_chunked: Read lines from a file or string by chunk.

In readr: Read Rectangular Text Data

Read lines from a file or string by chunk.

Description

Read lines from a file or string by chunk.

Usage

read_lines_chunked(
  file,
  callback,
  chunk_size = 10000,
  skip = 0,
  locale = default_locale(),
  na = character(),
  progress = show_progress()
)

read_lines_raw_chunked(
  file,
  callback,
  chunk_size = 10000,
  skip = 0,
  progress = show_progress()
)

Arguments

file	Either a path to a file, a connection, or literal data (either a single string or a raw vector). Files ending in .gz, .bz2, .xz, or .zip will be automatically uncompressed. Files starting with ⁠http://⁠, ⁠https://⁠, ⁠ftp://⁠, or ⁠ftps://⁠ will be automatically downloaded. Remote gz files can also be automatically downloaded and decompressed. Literal data is most useful for examples and tests. To be recognised as literal data, the input must be either wrapped with I(), be a string containing at least one new line, or be a vector containing at least one string with a new line. Using a value of clipboard() will read from the system clipboard.
callback	A callback function to call on each chunk
chunk_size	The number of rows to include in each chunk
skip	Number of lines to skip before reading data.
locale	The locale controls defaults that vary from place to place. The default locale is US-centric (like R), but you can use locale() to create your own locale that controls things like the default time zone, encoding, decimal mark, big mark, and day/month names.
na	Character vector of strings to interpret as missing values. Set this option to character() to indicate no missing values.
progress	Display a progress bar? By default it will only display in an interactive session and not while knitting a document. The automatic progress bar can be disabled by setting option readr.show_progress to FALSE.

See Also

Other chunked: callback, melt_delim_chunked(), read_delim_chunked()

readr documentation built on May 29, 2024, 2:37 a.m.