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<div class="header">
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<a href="#func-members">Functions</a>  </div>
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<div class="title">assoc_rules.sql_in File Reference</div>  </div>
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<div class="contents">

<p>The <a class="el" href="assoc__rules_8sql__in.html#a8362eb54bb0eeb551d5a1aadb96e7092">assoc_rules</a> function computes association rules for a given set of data. The data is assumed to have two dimensions; items (between which we are trying to discover associations), and a transaction id. This tranaction id groups the items by event and could also be a user id, date, etc. depending on the context of the data. This function assumes the data is stored in two columns with one transaction id and one item per row.  
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:a6af43dbd2fe9400f96c1ebf486e8ea40"><td class="memItemLeft" align="right" valign="top">set&lt; text[]&gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="assoc__rules_8sql__in.html#a6af43dbd2fe9400f96c1ebf486e8ea40">gen_rules_from_cfp</a> (text, int, int, int)</td></tr>
<tr class="separator:a6af43dbd2fe9400f96c1ebf486e8ea40"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a7c215a102cc18276a3ca14c38ed35f89"><td class="memItemLeft" align="right" valign="top">assoc_rules_results&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="assoc__rules_8sql__in.html#a7c215a102cc18276a3ca14c38ed35f89">assoc_rules</a> (float8 support, float8 confidence, text tid_col, text item_col, text input_table, text output_schema, boolean verbose, integer max_itemset_size, integer max_lhs_size, integer max_rhs_size)</td></tr>
<tr class="separator:a7c215a102cc18276a3ca14c38ed35f89"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a033f13252ebfc88b21f18835e5d3ce37"><td class="memItemLeft" align="right" valign="top">assoc_rules_results&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="assoc__rules_8sql__in.html#a033f13252ebfc88b21f18835e5d3ce37">assoc_rules</a> (float8 support, float8 confidence, text tid_col, text item_col, text input_table, text output_schema, boolean verbose, integer max_itemset_size, integer max_lhs_size)</td></tr>
<tr class="separator:a033f13252ebfc88b21f18835e5d3ce37"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a2ce0222d57332da628eb98220130e905"><td class="memItemLeft" align="right" valign="top">assoc_rules_results&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="assoc__rules_8sql__in.html#a2ce0222d57332da628eb98220130e905">assoc_rules</a> (float8 support, float8 confidence, text tid_col, text item_col, text input_table, text output_schema, boolean verbose, integer max_itemset_size)</td></tr>
<tr class="separator:a2ce0222d57332da628eb98220130e905"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a68a256d98b82ac15bac7df92e806f6f8"><td class="memItemLeft" align="right" valign="top">assoc_rules_results&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="assoc__rules_8sql__in.html#a68a256d98b82ac15bac7df92e806f6f8">assoc_rules</a> (float8 support, float8 confidence, text tid_col, text item_col, text input_table, text output_schema)</td></tr>
<tr class="memdesc:a68a256d98b82ac15bac7df92e806f6f8"><td class="mdescLeft">&#160;</td><td class="mdescRight">The short form of the above function with vobose removed.  <a href="#a68a256d98b82ac15bac7df92e806f6f8">More...</a><br /></td></tr>
<tr class="separator:a68a256d98b82ac15bac7df92e806f6f8"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af9456adb6dad01e452415b9a0a5371dc"><td class="memItemLeft" align="right" valign="top">assoc_rules_results&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="assoc__rules_8sql__in.html#af9456adb6dad01e452415b9a0a5371dc">assoc_rules</a> (float8 support, float8 confidence, text tid_col, text item_col, text input_table, text output_schema, boolean verbose)</td></tr>
<tr class="separator:af9456adb6dad01e452415b9a0a5371dc"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aeddb752c12b9af779d796b135f900e38"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="assoc__rules_8sql__in.html#aeddb752c12b9af779d796b135f900e38">assoc_rules</a> (text message)</td></tr>
<tr class="separator:aeddb752c12b9af779d796b135f900e38"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a8362eb54bb0eeb551d5a1aadb96e7092"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="assoc__rules_8sql__in.html#a8362eb54bb0eeb551d5a1aadb96e7092">assoc_rules</a> ()</td></tr>
<tr class="separator:a8362eb54bb0eeb551d5a1aadb96e7092"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><dl class="section date"><dt>Date</dt><dd>June 2011 </dd>
<dd>
August 2012</dd></dl>
<dl class="section see"><dt>See also</dt><dd>For a brief introduction to the association rules implementation, see the module description <a class="el" href="group__grp__assoc__rules.html">Apriori Algorithm</a>. </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="a7c215a102cc18276a3ca14c38ed35f89"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7c215a102cc18276a3ca14c38ed35f89">&#9670;&nbsp;</a></span>assoc_rules() <span class="overload">[1/7]</span></h2>

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        <tr>
          <td class="memname">assoc_rules_results assoc_rules </td>
          <td>(</td>
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        </tr>
        <tr>
          <td class="paramkey"></td>
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          <td class="paramkey"></td>
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          <td class="paramkey"></td>
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          <td class="paramname"><em>item_col</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
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          <td class="paramname"><em>input_table</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramkey"></td>
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          <td class="paramkey"></td>
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<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">support</td><td>minimum level of support needed for each itemset to be included in result </td></tr>
    <tr><td class="paramname">confidence</td><td>minimum level of confidence needed for each rule to be included in result </td></tr>
    <tr><td class="paramname">tid_col</td><td>name of the column storing the transaction ids </td></tr>
    <tr><td class="paramname">item_col</td><td>name of the column storing the products </td></tr>
    <tr><td class="paramname">input_table</td><td>name of the table where the data is stored </td></tr>
    <tr><td class="paramname">output_schema</td><td>name of the schema where the final results will be stored </td></tr>
    <tr><td class="paramname">verbose</td><td>determining if output contains comments</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The schema and table name containing association rules, and total number of rules found.</dd></dl>
<p>This function computes the association rules between products in a data set. It reads the name of the table, the column names of the product and ids, and computes ssociation rules using the Apriori algorithm, and subject to the support and confidence constraints as input by the user. This version of association rules has verbose functionality. When verbose is true, output of function includes iteration steps and comments on Apriori algorithm steps. </p>

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          <td class="memname">assoc_rules_results assoc_rules </td>
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          <td class="memname">assoc_rules_results assoc_rules </td>
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          <td class="memname">text assoc_rules </td>
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<h2 class="memtitle"><span class="permalink"><a href="#a8362eb54bb0eeb551d5a1aadb96e7092">&#9670;&nbsp;</a></span>assoc_rules() <span class="overload">[7/7]</span></h2>

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          <td class="memname">text assoc_rules </td>
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<h2 class="memtitle"><span class="permalink"><a href="#a6af43dbd2fe9400f96c1ebf486e8ea40">&#9670;&nbsp;</a></span>gen_rules_from_cfp()</h2>

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          <td class="memname">set&lt;text[]&gt; gen_rules_from_cfp </td>
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