Read a file as a Filebacked Data Frame by using package bigreadr.
FDF_read(file, filter = NULL, backingfile = drop_ext(file), ...)
Arguments
| file |
File to read. |
| filter |
Vector used to subset the rows of each data frame. |
| backingfile |
Path to the file storing the data frame on disk.
Default uses file without its extension. |
| ... |
Arguments passed on to bigreadr::big_fread2
- nb_parts
Number of parts in which to split reading (and transforming).
Parts are referring to blocks of selected columns.
Default uses part_size to set a good value. - skip
Number of lines to skip at the beginning of file. - select
Indices of columns to keep (sorted). Default keeps them all. - progress
Show progress? Default is FALSE. - part_size
Size of the parts if nb_parts is not supplied.
Default is 500 * 1024^2 (500 MB). |
Value
A Filebacked Data Frame.