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| <table width="100%" summary="page for freqItems {SparkR}"><tr><td>freqItems {SparkR}</td><td style="text-align: right;">R Documentation</td></tr></table> |
| |
| <h2>Finding frequent items for columns, possibly with false positives</h2> |
| |
| <h3>Description</h3> |
| |
| <p>Finding frequent items for columns, possibly with false positives. |
| Using the frequent element count algorithm described in |
| <a href="http://dx.doi.org/10.1145/762471.762473">http://dx.doi.org/10.1145/762471.762473</a>, proposed by Karp, Schenker, and Papadimitriou. |
| </p> |
| |
| |
| <h3>Usage</h3> |
| |
| <pre> |
| ## S4 method for signature 'SparkDataFrame,character' |
| freqItems(x, cols, support = 0.01) |
| </pre> |
| |
| |
| <h3>Arguments</h3> |
| |
| <table summary="R argblock"> |
| <tr valign="top"><td><code>x</code></td> |
| <td> |
| <p>A SparkDataFrame.</p> |
| </td></tr> |
| <tr valign="top"><td><code>cols</code></td> |
| <td> |
| <p>A vector column names to search frequent items in.</p> |
| </td></tr> |
| <tr valign="top"><td><code>support</code></td> |
| <td> |
| <p>(Optional) The minimum frequency for an item to be considered <code>frequent</code>. |
| Should be greater than 1e-4. Default support = 0.01.</p> |
| </td></tr> |
| </table> |
| |
| |
| <h3>Value</h3> |
| |
| <p>a local R data.frame with the frequent items in each column |
| </p> |
| |
| |
| <h3>Note</h3> |
| |
| <p>freqItems since 1.6.0 |
| </p> |
| |
| |
| <h3>See Also</h3> |
| |
| <p>Other stat functions: <code><a href="approxQuantile.html">approxQuantile</a></code>, |
| <code><a href="corr.html">corr</a></code>, <code><a href="cov.html">cov</a></code>, |
| <code><a href="crosstab.html">crosstab</a></code>, <code><a href="sampleBy.html">sampleBy</a></code> |
| </p> |
| |
| |
| <h3>Examples</h3> |
| |
| <pre><code class="r">## Not run: |
| ##D df <- read.json("/path/to/file.json") |
| ##D fi = freqItems(df, c("title", "gender")) |
| ## End(Not run) |
| </code></pre> |
| |
| |
| <hr /><div style="text-align: center;">[Package <em>SparkR</em> version 2.4.0 <a href="00Index.html">Index</a>]</div> |
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