droplevels.ff

<p>if <code>TRUE</code> the columns will be physically changed, 
otherwise (default) a new <code>ff</code> vector will be created</p>

inplace

<p>The function <code>droplevels</code> is used to drop unused levels from a <code>ff</code>
 factor or , more commonly, from factors in a <code>ffdf</code></p>

Extends the out of memory vectors of 'ff' with
statistical functions and other utilities to ease their usage.

Edwin Jonge

ffbase

Basic Statistical Functions for Package 'ff'

droplevels.ff function

The function <code>droplevels</code> is used to drop unused levels from a <code>ff</code>
 factor or , more commonly, from factors in a <code>ffdf</code> — droplevels.ff

The function <code>droplevels</code> is used to drop unused levels from a <code>ff</code>
 factor or , more commonly, from factors in a <code>ffdf</code>

droplevels.ff: The function `droplevels` is used to drop unused levels from a `ff` factor or , more commonly, from factors in a `ffdf`

Description

Usage

Arguments

Value

See Also