weightfunction.html

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<html><head><title>R: Weighting Function Constructor</title>
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<table width="100%" summary="page for WeightFunction {tm}"><tr><td>WeightFunction {tm}</td><td align="right">R Documentation</td></tr></table>
<h2>Weighting Function Constructor</h2>


<h3>Description</h3>

<p>
Constructs a weighting function for term-document matrices.
</p>


<h3>Usage</h3>

<pre>
WeightFunction(object, name)
</pre>


<h3>Arguments</h3>

<table summary="R argblock">
<tr valign="top"><td><code>object</code></td>
<td>
a function which takes a <code>dgCMatrix</code> term-document
matrix with term frequencies as input, weights the elements, and
returns the weighted matrix.</td></tr>
<tr valign="top"><td><code>name</code></td>
<td>
a character naming the weighting function</td></tr>
</table>

<h3>Value</h3>

<p>
An S4 object of class <code>WeightFunction</code> which extends the class
<code>function</code> representing a weighting function.</p>

<h3>Author(s)</h3>

<p>
Ingo Feinerer
</p>


<h3>Examples</h3>

<pre>
weightCutBin &lt;- WeightFunction(function(m, cutoff) as(m &gt; cutoff, "dgCMatrix"), "binary with cutoff")
</pre>



<hr><div align="center">[Package <em>tm</em> version 0.3 <a href="00Index.html">Index]</a></div>

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