laf_to_ffdf: Use LaF to import data into 'ffdf' data.frame

In ffbase: Basic Statistical Functions for Package 'ff'

Description

Use LaF to import data into a ffdf data.frame

Usage

laf_to_ffdf(laf, x = NULL, nrows = 1e+05, transFUN = NULL, ...)

Arguments

laf	laf object pointing to a csv or fwf file
x	optional, ffdf object where laf data should be appended to.
nrows,	number of rows per block, passed on to next_block
transFUN	NULL or a function that is called on each data.frame chunk which is read in using next_block. This can be used for filtering and data transformations.
...	passed on to next_block

ffbase documentation built on Feb. 27, 2021, 5:06 p.m.