View source: R/read_delim_chunked.R
read_delim_chunked | R Documentation |
Read a delimited file by chunks
read_delim_chunked( file, callback, delim = NULL, chunk_size = 10000, quote = "\"", escape_backslash = FALSE, escape_double = TRUE, col_names = TRUE, col_types = NULL, locale = default_locale(), na = c("", "NA"), quoted_na = TRUE, comment = "", trim_ws = FALSE, skip = 0, guess_max = chunk_size, progress = show_progress(), show_col_types = should_show_types(), skip_empty_rows = TRUE ) read_csv_chunked( file, callback, chunk_size = 10000, col_names = TRUE, col_types = NULL, locale = default_locale(), na = c("", "NA"), quoted_na = TRUE, quote = "\"", comment = "", trim_ws = TRUE, skip = 0, guess_max = chunk_size, progress = show_progress(), show_col_types = should_show_types(), skip_empty_rows = TRUE ) read_csv2_chunked( file, callback, chunk_size = 10000, col_names = TRUE, col_types = NULL, locale = default_locale(), na = c("", "NA"), quoted_na = TRUE, quote = "\"", comment = "", trim_ws = TRUE, skip = 0, guess_max = chunk_size, progress = show_progress(), show_col_types = should_show_types(), skip_empty_rows = TRUE ) read_tsv_chunked( file, callback, chunk_size = 10000, col_names = TRUE, col_types = NULL, locale = default_locale(), na = c("", "NA"), quoted_na = TRUE, quote = "\"", comment = "", trim_ws = TRUE, skip = 0, guess_max = chunk_size, progress = show_progress(), show_col_types = should_show_types(), skip_empty_rows = TRUE )
The number of lines in file
can exceed the maximum integer value in R (~2 billion).
Other chunked:
callback
,
melt_delim_chunked()
,
read_lines_chunked()
# Cars with 3 gears f <- function(x, pos) subset(x, gear == 3) read_csv_chunked(readr_example("mtcars.csv"), DataFrameCallback$new(f), chunk_size = 5)
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