droplevels.ffdf

specify which columns will be excluded from dropping levels

except

further arguments passed to <code><a rd-options="" href="/link/droplevels.ff?package=ffbase&version=0.13.1" data-mini-rdoc="ffbase::droplevels.ff">droplevels.ff</a></code>

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

inplace

The function <code>droplevels</code> is used to drop unused levels from factors 
in a <code><a rd-options="" href="/link/ffdf?package=ffbase&version=0.13.1" data-mini-rdoc="ffbase::ffdf">ffdf</a></code>

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.ffdf function

further arguments passed to <code><a rd-options='' href='droplevels.ff'>droplevels.ff</a></code>

The function <code>droplevels</code> is used to drop unused levels from factors 
in a <code><a rd-options='' href='ffdf'>ffdf</a></code>

The function <code>droplevels</code> is used to drop unused levels from factors 
in a <code><a rd-options='' href='ffdf'>ffdf</a></code> — droplevels.ffdf

The function <code>droplevels</code> is used to drop unused levels from factors 
in a <code><a rd-options='' href='ffdf'>ffdf</a></code>

The function <code>droplevels</code> is used to drop unused levels from factors 
in a <code><a rd-options="" href="/link/ffdf?package=ffbase&version=0.13.1" data-mini-rdoc="ffbase::ffdf">ffdf</a></code>

droplevels.ffdf: The function `droplevels` is used to drop unused levels from factors in a `ffdf`

Description

Usage

Arguments

Value

See Also