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Write a data frame to a delimited file

Source: R/vroom_write.R
vroom_write.Rd

Write a data frame to a delimited file

Usage

vroom_write(
  x,
  file,
  delim = "\t",
  eol = "\n",
  na = "NA",
  col_names = !append,
  append = FALSE,
  quote = c("needed", "all", "none"),
  escape = c("double", "backslash", "none"),
  bom = FALSE,
  num_threads = vroom_threads(),
  progress = vroom_progress(),
  path = deprecated()
)

Arguments

x

A data frame or tibble to write to disk.

file

File or connection to write to.

delim

Delimiter used to separate values. Defaults to \t to write tab separated value (TSV) files.

eol

The end of line character to use. Most commonly either "\n" for Unix style newlines, or "\r\n" for Windows style newlines.

na

String used for missing values. Defaults to 'NA'.

col_names

If FALSE, column names will not be included at the top of the file. If TRUE, column names will be included. If not specified, col_names will take the opposite value given to append.

append

If FALSE, will overwrite existing file. If TRUE, will append to existing file. In both cases, if the file does not exist a new file is created.

quote

How to handle fields which contain characters that need to be quoted.

  • needed - Values are only quoted if needed: if they contain a delimiter, quote, or newline.

  • all - Quote all fields.

  • none - Never quote fields.

escape

The type of escape to use when quotes are in the data.

  • double - quotes are escaped by doubling them.

  • backslash - quotes are escaped by a preceding backslash.

  • none - quotes are not escaped.

bom

If TRUE add a UTF-8 BOM at the beginning of the file. This is recommended when saving data for consumption by excel, as it will force excel to read the data with the correct encoding (UTF-8)

num_threads

Number of threads to use when reading and materializing vectors. If your data contains newlines within fields the parser will automatically be forced to use a single thread only.

progress

Display a progress bar? By default it will only display in an interactive session and not while knitting a document. The display is updated every 50,000 values and will only display if estimated reading time is 5 seconds or more. The automatic progress bar can be disabled by setting option readr.show_progress to FALSE.

path

[Deprecated] is no longer supported, use file instead.

Examples

# If you only specify a file name, vroom_write() will write
# the file to your current working directory.
out_file <- tempfile(fileext = "csv")
vroom_write(mtcars, out_file, ",")

# You can also use a literal filename
# vroom_write(mtcars, "mtcars.tsv")

# If you add an extension to the file name, write_()* will
# automatically compress the output.
# vroom_write(mtcars, "mtcars.tsv.gz")
# vroom_write(mtcars, "mtcars.tsv.bz2")
# vroom_write(mtcars, "mtcars.tsv.xz")