[[,laf-method

$,laf-method

Selecting columns from an <code>laf</code> object works as it does for a 
<code>data.frame</code>.

Methods for fast access to large ASCII files.  Currently the
following file formats are supported: comma separated format (CSV) and fixed
width format. It is assumed that the files are too large to fit into memory,
although the package can also be used to efficiently access files that do
fit into memory. Methods are provided to access and process files blockwise.
Furthermore, an opened file can be accessed as one would an ordinary
data.frame. The LaF vignette gives an overview of the functionality
provided.

Jan der Laan

Fast Access to Large ASCII Files

Jan van der Laan

[[,laf-method function

<dl><dt>x</dt>
<dd>an object of type <code>laf</code></dd>
<dt>i</dt>
<dd>index of column to select. This should be a numeric or character
vector.</dd>
<dt>name</dt>
<dd>the name of the column to select.</dd></dl>

Arguments

Select a column from a LaF object — [[,laf-method

<dl>

<dt>x</dt>
<dd>an object of type <code>laf</code></dd>


<dt>i</dt>
<dd>index of column to select. This should be a numeric or character
vector.</dd>


<dt>name</dt>
<dd>the name of the column to select.</dd>

</dl>

[[,laf-method: Select a column from a LaF object

Description

Usage

Value

Arguments