write_delim | R Documentation |
The write_*()
family of functions are an improvement to analogous function such
as write.csv()
because they are approximately twice as fast. Unlike write.csv()
,
these functions do not include row names as a column in the written file.
A generic function, output_column()
, is applied to each variable
to coerce columns to suitable output.
write_delim( x, file, delim = " ", na = "NA", append = FALSE, col_names = !append, quote = c("needed", "all", "none"), escape = c("double", "backslash", "none"), eol = "\n", num_threads = readr_threads(), progress = show_progress(), path = deprecated(), quote_escape = deprecated() ) write_csv( x, file, na = "NA", append = FALSE, col_names = !append, quote = c("needed", "all", "none"), escape = c("double", "backslash", "none"), eol = "\n", num_threads = readr_threads(), progress = show_progress(), path = deprecated(), quote_escape = deprecated() ) write_csv2( x, file, na = "NA", append = FALSE, col_names = !append, quote = c("needed", "all", "none"), escape = c("double", "backslash", "none"), eol = "\n", num_threads = readr_threads(), progress = show_progress(), path = deprecated(), quote_escape = deprecated() ) write_excel_csv( x, file, na = "NA", append = FALSE, col_names = !append, delim = ",", quote = "all", escape = c("double", "backslash", "none"), eol = "\n", num_threads = readr_threads(), progress = show_progress(), path = deprecated(), quote_escape = deprecated() ) write_excel_csv2( x, file, na = "NA", append = FALSE, col_names = !append, delim = ";", quote = "all", escape = c("double", "backslash", "none"), eol = "\n", num_threads = readr_threads(), progress = show_progress(), path = deprecated(), quote_escape = deprecated() ) write_tsv( x, file, na = "NA", append = FALSE, col_names = !append, quote = "none", escape = c("double", "backslash", "none"), eol = "\n", num_threads = readr_threads(), progress = show_progress(), path = deprecated(), quote_escape = deprecated() )
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 |
na |
String used for missing values. Defaults to NA. Missing values
will never be quoted; strings with the same value as |
append |
If |
col_names |
If |
quote |
How to handle fields which contain characters that need to be quoted.
|
escape |
The type of escape to use when quotes are in the data.
|
eol |
The end of line character to use. Most commonly either |
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 |
path |
|
quote_escape |
write_*()
returns the input x
invisibly.
Factors are coerced to character. Doubles are formatted to a decimal string
using the grisu3 algorithm. POSIXct
values are formatted as ISO8601 with a
UTC timezone Note: POSIXct
objects in local or non-UTC timezones will be
converted to UTC time before writing.
All columns are encoded as UTF-8. write_excel_csv()
and write_excel_csv2()
also include a
UTF-8 Byte order mark
which indicates to Excel the csv is UTF-8 encoded.
write_excel_csv2()
and write_csv2
were created to allow users with
different locale settings to save .csv files using their default settings
(e.g. ;
as the column separator and ,
as the decimal separator).
This is common in some European countries.
Values are only quoted if they contain a comma, quote or newline.
The write_*()
functions will automatically compress outputs if an appropriate extension is given.
Three extensions are currently supported: .gz
for gzip compression, .bz2
for bzip2 compression and
.xz
for lzma compression. See the examples for more information.
Florian Loitsch, Printing Floating-Point Numbers Quickly and Accurately with Integers, PLDI '10, http://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf
# If only a file name is specified, write_()* will write # the file to the current working directory. write_csv(mtcars, "mtcars.csv") write_tsv(mtcars, "mtcars.tsv") # If you add an extension to the file name, write_()* will # automatically compress the output. write_tsv(mtcars, "mtcars.tsv.gz") write_tsv(mtcars, "mtcars.tsv.bz2") write_tsv(mtcars, "mtcars.tsv.xz")
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