Write a file from a Filebacked Big Matrix (by parts).

big_write(
X,
file,
every_nrow,
...,
ind.row = rows_along(X),
ind.col = cols_along(X),
progress = FALSE
)

Arguments

X An object of class FBM. File to write to. Number of rows to write at once. Other arguments to be passed to data.table::fwrite, except x, file, append, row.names, col.names and showProgress. An optional vector of the row indices that are used. If not specified, all rows are used. Don't use negative indices. An optional vector of the column indices that are used. If not specified, all columns are used. Don't use negative indices. Show progress? Default is FALSE.

Value

Input parameter file, invisibly.

Examples

X <- big_attachExtdata()
csv <- big_write(X, tempfile(), every_nrow = 100, progress = interactive())