ffbase (version 0.12.7)

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

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