| <!-- HTML header for doxygen 1.8.4--> |
| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
| <html xmlns="http://www.w3.org/1999/xhtml"> |
| <head> |
| <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> |
| <meta http-equiv="X-UA-Compatible" content="IE=9"/> |
| <meta name="generator" content="Doxygen 1.8.13"/> |
| <meta name="keywords" content="madlib,postgres,greenplum,machine learning,data mining,deep learning,ensemble methods,data science,market basket analysis,affinity analysis,pca,lda,regression,elastic net,huber white,proportional hazards,k-means,latent dirichlet allocation,bayes,support vector machines,svm"/> |
| <title>MADlib: sample.sql_in File Reference</title> |
| <link href="tabs.css" rel="stylesheet" type="text/css"/> |
| <script type="text/javascript" src="jquery.js"></script> |
| <script type="text/javascript" src="dynsections.js"></script> |
| <link href="navtree.css" rel="stylesheet" type="text/css"/> |
| <script type="text/javascript" src="resize.js"></script> |
| <script type="text/javascript" src="navtreedata.js"></script> |
| <script type="text/javascript" src="navtree.js"></script> |
| <script type="text/javascript"> |
| $(document).ready(initResizable); |
| </script> |
| <link href="search/search.css" rel="stylesheet" type="text/css"/> |
| <script type="text/javascript" src="search/searchdata.js"></script> |
| <script type="text/javascript" src="search/search.js"></script> |
| <script type="text/javascript"> |
| $(document).ready(function() { init_search(); }); |
| </script> |
| <script type="text/x-mathjax-config"> |
| MathJax.Hub.Config({ |
| extensions: ["tex2jax.js", "TeX/AMSmath.js", "TeX/AMSsymbols.js"], |
| jax: ["input/TeX","output/HTML-CSS"], |
| }); |
| </script><script type="text/javascript" src="http://cdn.mathjax.org/mathjax/latest/MathJax.js"></script> |
| <!-- hack in the navigation tree --> |
| <script type="text/javascript" src="eigen_navtree_hacks.js"></script> |
| <link href="doxygen.css" rel="stylesheet" type="text/css" /> |
| <link href="madlib_extra.css" rel="stylesheet" type="text/css"/> |
| <!-- google analytics --> |
| <script> |
| (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ |
| (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), |
| m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) |
| })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); |
| ga('create', 'UA-45382226-1', 'madlib.apache.org'); |
| ga('send', 'pageview'); |
| </script> |
| </head> |
| <body> |
| <div id="top"><!-- do not remove this div, it is closed by doxygen! --> |
| <div id="titlearea"> |
| <table cellspacing="0" cellpadding="0"> |
| <tbody> |
| <tr style="height: 56px;"> |
| <td id="projectlogo"><a href="http://madlib.apache.org"><img alt="Logo" src="madlib.png" height="50" style="padding-left:0.5em;" border="0"/ ></a></td> |
| <td style="padding-left: 0.5em;"> |
| <div id="projectname"> |
| <span id="projectnumber">1.18.0</span> |
| </div> |
| <div id="projectbrief">User Documentation for Apache MADlib</div> |
| </td> |
| <td> <div id="MSearchBox" class="MSearchBoxInactive"> |
| <span class="left"> |
| <img id="MSearchSelect" src="search/mag_sel.png" |
| onmouseover="return searchBox.OnSearchSelectShow()" |
| onmouseout="return searchBox.OnSearchSelectHide()" |
| alt=""/> |
| <input type="text" id="MSearchField" value="Search" accesskey="S" |
| onfocus="searchBox.OnSearchFieldFocus(true)" |
| onblur="searchBox.OnSearchFieldFocus(false)" |
| onkeyup="searchBox.OnSearchFieldChange(event)"/> |
| </span><span class="right"> |
| <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a> |
| </span> |
| </div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <!-- end header part --> |
| <!-- Generated by Doxygen 1.8.13 --> |
| <script type="text/javascript"> |
| var searchBox = new SearchBox("searchBox", "search",false,'Search'); |
| </script> |
| </div><!-- top --> |
| <div id="side-nav" class="ui-resizable side-nav-resizable"> |
| <div id="nav-tree"> |
| <div id="nav-tree-contents"> |
| <div id="nav-sync" class="sync"></div> |
| </div> |
| </div> |
| <div id="splitbar" style="-moz-user-select:none;" |
| class="ui-resizable-handle"> |
| </div> |
| </div> |
| <script type="text/javascript"> |
| $(document).ready(function(){initNavTree('sample_8sql__in.html','');}); |
| </script> |
| <div id="doc-content"> |
| <!-- window showing the filter options --> |
| <div id="MSearchSelectWindow" |
| onmouseover="return searchBox.OnSearchSelectShow()" |
| onmouseout="return searchBox.OnSearchSelectHide()" |
| onkeydown="return searchBox.OnSearchSelectKey(event)"> |
| </div> |
| |
| <!-- iframe showing the search results (closed by default) --> |
| <div id="MSearchResultsWindow"> |
| <iframe src="javascript:void(0)" frameborder="0" |
| name="MSearchResults" id="MSearchResults"> |
| </iframe> |
| </div> |
| |
| <div class="header"> |
| <div class="summary"> |
| <a href="#func-members">Functions</a> </div> |
| <div class="headertitle"> |
| <div class="title">sample.sql_in File Reference</div> </div> |
| </div><!--header--> |
| <div class="contents"> |
| |
| <p>SQL functions for random sampling. |
| <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:af933c6e9d6623c62a671dc74e5bd9d51"><td class="memItemLeft" align="right" valign="top">bytea8 </td><td class="memItemRight" valign="bottom"><a class="el" href="sample_8sql__in.html#af933c6e9d6623c62a671dc74e5bd9d51">weighted_sample_transition_int64</a> (bytea8 state, bigint value, float8 weight)</td></tr> |
| <tr class="separator:af933c6e9d6623c62a671dc74e5bd9d51"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:aa066d40345787e00819963f095f40998"><td class="memItemLeft" align="right" valign="top">bytea8 </td><td class="memItemRight" valign="bottom"><a class="el" href="sample_8sql__in.html#aa066d40345787e00819963f095f40998">weighted_sample_merge_int64</a> (bytea8 state_left, bytea8 state_right)</td></tr> |
| <tr class="separator:aa066d40345787e00819963f095f40998"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a5c2226995c3ef02cb2320b9829bad5eb"><td class="memItemLeft" align="right" valign="top">bigint </td><td class="memItemRight" valign="bottom"><a class="el" href="sample_8sql__in.html#a5c2226995c3ef02cb2320b9829bad5eb">weighted_sample_final_int64</a> (bytea8 state)</td></tr> |
| <tr class="separator:a5c2226995c3ef02cb2320b9829bad5eb"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:ab933c8334edc748aa9ef46b9bb50e60e"><td class="memItemLeft" align="right" valign="top">aggregate bytea8 </td><td class="memItemRight" valign="bottom"><a class="el" href="sample_8sql__in.html#ab933c8334edc748aa9ef46b9bb50e60e">weighted_sample</a> (bigint value, float8 weight)</td></tr> |
| <tr class="memdesc:ab933c8334edc748aa9ef46b9bb50e60e"><td class="mdescLeft"> </td><td class="mdescRight">Sample a single row according to weights. <a href="#ab933c8334edc748aa9ef46b9bb50e60e">More...</a><br /></td></tr> |
| <tr class="separator:ab933c8334edc748aa9ef46b9bb50e60e"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:ae7ad8a80a8c2508cc54cf496934017c2"><td class="memItemLeft" align="right" valign="top">bytea8 </td><td class="memItemRight" valign="bottom"><a class="el" href="sample_8sql__in.html#ae7ad8a80a8c2508cc54cf496934017c2">weighted_sample_transition_vector</a> (bytea8 state, float8[] value, float8 weight)</td></tr> |
| <tr class="separator:ae7ad8a80a8c2508cc54cf496934017c2"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:ac5d00ff9e30dcae8a1b6b8450df3e95e"><td class="memItemLeft" align="right" valign="top">bytea8 </td><td class="memItemRight" valign="bottom"><a class="el" href="sample_8sql__in.html#ac5d00ff9e30dcae8a1b6b8450df3e95e">weighted_sample_merge_vector</a> (bytea8 state_left, bytea8 state_right)</td></tr> |
| <tr class="separator:ac5d00ff9e30dcae8a1b6b8450df3e95e"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a8b2b3bb57b01f47bafe44bea73f39f78"><td class="memItemLeft" align="right" valign="top">float8 [] </td><td class="memItemRight" valign="bottom"><a class="el" href="sample_8sql__in.html#a8b2b3bb57b01f47bafe44bea73f39f78">weighted_sample_final_vector</a> (bytea8 state)</td></tr> |
| <tr class="separator:a8b2b3bb57b01f47bafe44bea73f39f78"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:aa650ad075377cec7c6e1ece37c2b55b0"><td class="memItemLeft" align="right" valign="top">aggregate bytea8 </td><td class="memItemRight" valign="bottom"><a class="el" href="sample_8sql__in.html#aa650ad075377cec7c6e1ece37c2b55b0">weighted_sample</a> (float8[] value, float8 weight)</td></tr> |
| <tr class="separator:aa650ad075377cec7c6e1ece37c2b55b0"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a2051a3f21bc06e3c6e3efcd7492b71c4"><td class="memItemLeft" align="right" valign="top">integer </td><td class="memItemRight" valign="bottom"><a class="el" href="sample_8sql__in.html#a2051a3f21bc06e3c6e3efcd7492b71c4">poisson_random</a> (float8 <a class="el" href="svec__util_8sql__in.html#a546b947319c9f48237120a31929bdfd9">mean</a>)</td></tr> |
| <tr class="separator:a2051a3f21bc06e3c6e3efcd7492b71c4"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:afc523f72e64820329acb8874c2a759d3"><td class="memItemLeft" align="right" valign="top">float8 </td><td class="memItemRight" valign="bottom"><a class="el" href="sample_8sql__in.html#afc523f72e64820329acb8874c2a759d3">gamma_random</a> (float8 alpha)</td></tr> |
| <tr class="separator:afc523f72e64820329acb8874c2a759d3"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:af0bfa324d198f8059566757f38fe5c93"><td class="memItemLeft" align="right" valign="top">integer </td><td class="memItemRight" valign="bottom"><a class="el" href="sample_8sql__in.html#af0bfa324d198f8059566757f38fe5c93">index_weighted_sample</a> (float8[])</td></tr> |
| <tr class="separator:af0bfa324d198f8059566757f38fe5c93"><td class="memSeparator" colspan="2"> </td></tr> |
| </table> |
| <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> |
| <div class="textblock"><dl class="section see"><dt>See also</dt><dd>For an overview of random-sampling functions, see the module description <a class="el" href="group__grp__sample.html">Random Sampling</a>. </dd></dl> |
| </div><h2 class="groupheader">Function Documentation</h2> |
| <a id="afc523f72e64820329acb8874c2a759d3"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#afc523f72e64820329acb8874c2a759d3">◆ </a></span>gamma_random()</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">float8 gamma_random </td> |
| <td>(</td> |
| <td class="paramtype">float8 </td> |
| <td class="paramname"><em>alpha</em></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| </div> |
| </div> |
| <a id="af0bfa324d198f8059566757f38fe5c93"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#af0bfa324d198f8059566757f38fe5c93">◆ </a></span>index_weighted_sample()</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">integer index_weighted_sample </td> |
| <td>(</td> |
| <td class="paramtype">float8 </td> |
| <td class="paramname">[]</td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| </div> |
| </div> |
| <a id="a2051a3f21bc06e3c6e3efcd7492b71c4"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#a2051a3f21bc06e3c6e3efcd7492b71c4">◆ </a></span>poisson_random()</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">integer poisson_random </td> |
| <td>(</td> |
| <td class="paramtype">float8 </td> |
| <td class="paramname"><em>mean</em></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| </div> |
| </div> |
| <a id="ab933c8334edc748aa9ef46b9bb50e60e"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#ab933c8334edc748aa9ef46b9bb50e60e">◆ </a></span>weighted_sample() <span class="overload">[1/2]</span></h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">aggregate bytea8 weighted_sample </td> |
| <td>(</td> |
| <td class="paramtype">bigint </td> |
| <td class="paramname"><em>value</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">float8 </td> |
| <td class="paramname"><em>weight</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <dl class="params"><dt>Parameters</dt><dd> |
| <table class="params"> |
| <tr><td class="paramname">value</td><td>Value of row. Uniqueness is not enforced. If a value occurs multiple times, the probability of sampling this value is proportional to the sum of its weights. </td></tr> |
| <tr><td class="paramname">weight</td><td>Weight for row. A negative value here is treated has zero weight. </td></tr> |
| </table> |
| </dd> |
| </dl> |
| <dl class="section return"><dt>Returns</dt><dd><code>identifier</code> of the selected row. The probability of sampling any particular row <code>(value, weight)</code> is <code>weight/SUM(weight)</code>. </dd></dl> |
| |
| </div> |
| </div> |
| <a id="aa650ad075377cec7c6e1ece37c2b55b0"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#aa650ad075377cec7c6e1ece37c2b55b0">◆ </a></span>weighted_sample() <span class="overload">[2/2]</span></h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">aggregate bytea8 weighted_sample </td> |
| <td>(</td> |
| <td class="paramtype">float8 [] </td> |
| <td class="paramname"><em>value</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">float8 </td> |
| <td class="paramname"><em>weight</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| </div> |
| </div> |
| <a id="a5c2226995c3ef02cb2320b9829bad5eb"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#a5c2226995c3ef02cb2320b9829bad5eb">◆ </a></span>weighted_sample_final_int64()</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">bigint weighted_sample_final_int64 </td> |
| <td>(</td> |
| <td class="paramtype">bytea8 </td> |
| <td class="paramname"><em>state</em></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| </div> |
| </div> |
| <a id="a8b2b3bb57b01f47bafe44bea73f39f78"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#a8b2b3bb57b01f47bafe44bea73f39f78">◆ </a></span>weighted_sample_final_vector()</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">float8 [] weighted_sample_final_vector </td> |
| <td>(</td> |
| <td class="paramtype">bytea8 </td> |
| <td class="paramname"><em>state</em></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| </div> |
| </div> |
| <a id="aa066d40345787e00819963f095f40998"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#aa066d40345787e00819963f095f40998">◆ </a></span>weighted_sample_merge_int64()</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">bytea8 weighted_sample_merge_int64 </td> |
| <td>(</td> |
| <td class="paramtype">bytea8 </td> |
| <td class="paramname"><em>state_left</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">bytea8 </td> |
| <td class="paramname"><em>state_right</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| </div> |
| </div> |
| <a id="ac5d00ff9e30dcae8a1b6b8450df3e95e"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#ac5d00ff9e30dcae8a1b6b8450df3e95e">◆ </a></span>weighted_sample_merge_vector()</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">bytea8 weighted_sample_merge_vector </td> |
| <td>(</td> |
| <td class="paramtype">bytea8 </td> |
| <td class="paramname"><em>state_left</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">bytea8 </td> |
| <td class="paramname"><em>state_right</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| </div> |
| </div> |
| <a id="af933c6e9d6623c62a671dc74e5bd9d51"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#af933c6e9d6623c62a671dc74e5bd9d51">◆ </a></span>weighted_sample_transition_int64()</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">bytea8 weighted_sample_transition_int64 </td> |
| <td>(</td> |
| <td class="paramtype">bytea8 </td> |
| <td class="paramname"><em>state</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">bigint </td> |
| <td class="paramname"><em>value</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">float8 </td> |
| <td class="paramname"><em>weight</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| </div> |
| </div> |
| <a id="ae7ad8a80a8c2508cc54cf496934017c2"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#ae7ad8a80a8c2508cc54cf496934017c2">◆ </a></span>weighted_sample_transition_vector()</h2> |
| |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">bytea8 weighted_sample_transition_vector </td> |
| <td>(</td> |
| <td class="paramtype">bytea8 </td> |
| <td class="paramname"><em>state</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">float8 [] </td> |
| <td class="paramname"><em>value</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">float8 </td> |
| <td class="paramname"><em>weight</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| </div> |
| </div> |
| </div><!-- contents --> |
| </div><!-- doc-content --> |
| <!-- start footer part --> |
| <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> |
| <ul> |
| <li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_efbcf68973d247bbf15f9eecae7f24e3.html">ports</a></li><li class="navelem"><a class="el" href="dir_a4a48839224ef8488facbffa8a397967.html">postgres</a></li><li class="navelem"><a class="el" href="dir_dc596537ad427a4d866006d1a3e1fe29.html">modules</a></li><li class="navelem"><a class="el" href="dir_e6c126a997181663ba81c11cbf416bb1.html">sample</a></li><li class="navelem"><a class="el" href="sample_8sql__in.html">sample.sql_in</a></li> |
| <li class="footer">Generated on Wed Mar 31 2021 20:45:46 for MADlib by |
| <a href="http://www.doxygen.org/index.html"> |
| <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.13 </li> |
| </ul> |
| </div> |
| </body> |
| </html> |
