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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">logistic.sql_in File Reference</div>  </div>
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<p>SQL functions for logistic regression.  
<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:a874e9c5a3ebb7efab16730f85d3e8d25"><td class="memItemLeft" align="right" valign="top">float8 []&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a874e9c5a3ebb7efab16730f85d3e8d25">__logregr_cg_step_transition</a> (float8[], boolean, float8[], float8[])</td></tr>
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<tr class="memitem:a0f4010cefc479196d2d280514f92e5b0"><td class="memItemLeft" align="right" valign="top">float8 []&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a0f4010cefc479196d2d280514f92e5b0">__logregr_igd_step_transition</a> (float8[], boolean, float8[], float8[])</td></tr>
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<tr class="memitem:ae4f6142efcde3c7d72405f5daf218af7"><td class="memItemLeft" align="right" valign="top">float8 []&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#ae4f6142efcde3c7d72405f5daf218af7">__logregr_cg_step_merge_states</a> (float8[] state1, float8[] state2)</td></tr>
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<tr class="memitem:a45fbe307010fcb5890828e35a398c0a6"><td class="memItemLeft" align="right" valign="top">float8 []&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a45fbe307010fcb5890828e35a398c0a6">__logregr_irls_step_final</a> (float8[] state)</td></tr>
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<tr class="memitem:a44b3499c913ddcc44b0b9e18e2069fed"><td class="memItemLeft" align="right" valign="top">float8 []&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a44b3499c913ddcc44b0b9e18e2069fed">__logregr_igd_step_final</a> (float8[] state)</td></tr>
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<tr class="memitem:a0037d0e2891dff4ec1b4e856b9ac103c"><td class="memItemLeft" align="right" valign="top">aggregate float8 []&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a0037d0e2891dff4ec1b4e856b9ac103c">__logregr_cg_step</a> (boolean y, float8[] x, float8[] previous_state)</td></tr>
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<tr class="memitem:af5fcfe75b7724e0b93901e64e3f8c1b4"><td class="memItemLeft" align="right" valign="top">__logregr_result&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#af5fcfe75b7724e0b93901e64e3f8c1b4">__logregr_cg_result</a> (float8[] state)</td></tr>
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<tr class="memitem:a56962d63f19d6c4672f9772f6d2b2810"><td class="memItemLeft" align="right" valign="top">float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a56962d63f19d6c4672f9772f6d2b2810">__logregr_irls_step_distance</a> (float8[] state1, float8[] state2)</td></tr>
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<tr class="separator:aaaf5ea72356ebae7e808b54c495bc501"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a993ec0ebec0084170902c0cefc489ae8"><td class="memItemLeft" align="right" valign="top">float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a993ec0ebec0084170902c0cefc489ae8">__logregr_igd_step_distance</a> (float8[] state1, float8[] state2)</td></tr>
<tr class="separator:a993ec0ebec0084170902c0cefc489ae8"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="separator:ab0b377e0dc63a7d79602643a6ee827c9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a74210a7ef513dfcbdfdd9f3b37bfe428"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a74210a7ef513dfcbdfdd9f3b37bfe428">logregr_train</a> (varchar source_table, varchar out_table, varchar dependent_varname, varchar independent_varname, varchar grouping_cols, integer max_iter, varchar optimizer, float8 tolerance, boolean verbose)</td></tr>
<tr class="memdesc:a74210a7ef513dfcbdfdd9f3b37bfe428"><td class="mdescLeft">&#160;</td><td class="mdescRight">Compute logistic-regression coefficients and diagnostic statistics.  <a href="#a74210a7ef513dfcbdfdd9f3b37bfe428">More...</a><br /></td></tr>
<tr class="separator:a74210a7ef513dfcbdfdd9f3b37bfe428"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a58dfa3dc74518179c584ae535e331a7d"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a58dfa3dc74518179c584ae535e331a7d">logregr_train</a> (varchar source_table, varchar out_table, varchar dependent_varname, varchar independent_varname)</td></tr>
<tr class="separator:a58dfa3dc74518179c584ae535e331a7d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a327660873183347c9e00bdbd01983a63"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a327660873183347c9e00bdbd01983a63">logregr_train</a> (varchar source_table, varchar out_table, varchar dependent_varname, varchar independent_varname, varchar grouping_cols)</td></tr>
<tr class="separator:a327660873183347c9e00bdbd01983a63"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a3c217840f2fbe1dcd53ba15c4111b86a"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a3c217840f2fbe1dcd53ba15c4111b86a">logregr_train</a> (varchar source_table, varchar out_table, varchar dependent_varname, varchar independent_varname, varchar grouping_cols, integer max_iter)</td></tr>
<tr class="separator:a3c217840f2fbe1dcd53ba15c4111b86a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa321fe6cffa263b1eb612b15e8fb9a6d"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#aa321fe6cffa263b1eb612b15e8fb9a6d">logregr_train</a> (varchar source_table, varchar out_table, varchar dependent_varname, varchar independent_varname, varchar grouping_cols, integer max_iter, varchar optimizer)</td></tr>
<tr class="separator:aa321fe6cffa263b1eb612b15e8fb9a6d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6b5ffd41b8b00e4c4417653250a265fb"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a6b5ffd41b8b00e4c4417653250a265fb">logregr_train</a> (varchar source_table, varchar out_table, varchar dependent_varname, varchar independent_varname, varchar grouping_cols, integer max_iter, varchar optimizer, float8 tolerance)</td></tr>
<tr class="separator:a6b5ffd41b8b00e4c4417653250a265fb"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a3fbbdd2e6633816136d2958db9b4b6a3"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a3fbbdd2e6633816136d2958db9b4b6a3">logregr_train</a> (text message)</td></tr>
<tr class="separator:a3fbbdd2e6633816136d2958db9b4b6a3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ada5fbc0833e802e7e6c1b489330ca15f"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#ada5fbc0833e802e7e6c1b489330ca15f">logregr_train</a> ()</td></tr>
<tr class="separator:ada5fbc0833e802e7e6c1b489330ca15f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a4ded9be5c8b111dbb3109efaad83d69e"><td class="memItemLeft" align="right" valign="top">float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a4ded9be5c8b111dbb3109efaad83d69e">logistic</a> (float8 x)</td></tr>
<tr class="memdesc:a4ded9be5c8b111dbb3109efaad83d69e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Evaluate the usual logistic function in an under-/overflow-safe way.  <a href="#a4ded9be5c8b111dbb3109efaad83d69e">More...</a><br /></td></tr>
<tr class="separator:a4ded9be5c8b111dbb3109efaad83d69e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:abb60fcbfa7f13c4b62950b3ae5ee46b2"><td class="memItemLeft" align="right" valign="top">boolean&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#abb60fcbfa7f13c4b62950b3ae5ee46b2">logregr_predict</a> (float8[] coef, float8[] col_ind_var)</td></tr>
<tr class="memdesc:abb60fcbfa7f13c4b62950b3ae5ee46b2"><td class="mdescLeft">&#160;</td><td class="mdescRight">Predict the boolean value of a dependent variable for a specific independent variable value in a logistic regression model.  <a href="#abb60fcbfa7f13c4b62950b3ae5ee46b2">More...</a><br /></td></tr>
<tr class="separator:abb60fcbfa7f13c4b62950b3ae5ee46b2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:acc8af7a39e7b0d604c2760d9d6bd0b5e"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#acc8af7a39e7b0d604c2760d9d6bd0b5e">logregr_predict</a> (text message)</td></tr>
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<tr class="separator:af3eae2b8acd75d4c6c4db8c79489c58f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:acb8bcffac549a0968f6ee7c2d7f34d5e"><td class="memItemLeft" align="right" valign="top">float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#acb8bcffac549a0968f6ee7c2d7f34d5e">logregr_predict_prob</a> (float8[] coef, float8[] col_ind_var)</td></tr>
<tr class="memdesc:acb8bcffac549a0968f6ee7c2d7f34d5e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Compute the probability of the boolean dependent variable being True for a specific independent variable iin a logistic regression model.  <a href="#acb8bcffac549a0968f6ee7c2d7f34d5e">More...</a><br /></td></tr>
<tr class="separator:acb8bcffac549a0968f6ee7c2d7f34d5e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a4db4a78e264cc4868c931f5b5cf8b414"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a4db4a78e264cc4868c931f5b5cf8b414">logregr_predict_prob</a> (text message)</td></tr>
<tr class="separator:a4db4a78e264cc4868c931f5b5cf8b414"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a75dba5248d75cd6c5d2fb69f944ce479"><td class="memItemLeft" align="right" valign="top">text&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="logistic_8sql__in.html#a75dba5248d75cd6c5d2fb69f944ce479">logregr_predict_prob</a> ()</td></tr>
<tr class="separator:a75dba5248d75cd6c5d2fb69f944ce479"><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>January 2011</dd></dl>
<dl class="section see"><dt>See also</dt><dd>For a brief introduction to <a class="el" href="logistic_8sql__in.html#a4ded9be5c8b111dbb3109efaad83d69e" title="Evaluate the usual logistic function in an under-/overflow-safe way. ">logistic</a> regression, see the module description <a class="el" href="group__grp__logreg.html">Logistic Regression</a>. </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="af5fcfe75b7724e0b93901e64e3f8c1b4"></a>
<h2 class="memtitle"><span class="permalink"><a href="#af5fcfe75b7724e0b93901e64e3f8c1b4">&#9670;&nbsp;</a></span>__logregr_cg_result()</h2>

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          <td class="memname">__logregr_result __logregr_cg_result </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a0037d0e2891dff4ec1b4e856b9ac103c">&#9670;&nbsp;</a></span>__logregr_cg_step()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">aggregate float8 [] __logregr_cg_step </td>
          <td>(</td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname"><em>y</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>x</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>previous_state</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
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<h2 class="memtitle"><span class="permalink"><a href="#aabc041a54449405558d8a522f0e7d995">&#9670;&nbsp;</a></span>__logregr_cg_step_distance()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">float8 __logregr_cg_step_distance </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state1</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state2</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
<a id="a909ec8b38aac9dd78ed7fb52e5e5910d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a909ec8b38aac9dd78ed7fb52e5e5910d">&#9670;&nbsp;</a></span>__logregr_cg_step_final()</h2>

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      <table class="memname">
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          <td class="memname">float8 [] __logregr_cg_step_final </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state</em></td><td>)</td>
          <td></td>
        </tr>
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<h2 class="memtitle"><span class="permalink"><a href="#ae4f6142efcde3c7d72405f5daf218af7">&#9670;&nbsp;</a></span>__logregr_cg_step_merge_states()</h2>

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          <td class="memname">float8 [] __logregr_cg_step_merge_states </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state1</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state2</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

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<a id="a874e9c5a3ebb7efab16730f85d3e8d25"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a874e9c5a3ebb7efab16730f85d3e8d25">&#9670;&nbsp;</a></span>__logregr_cg_step_transition()</h2>

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          <td class="memname">float8 [] __logregr_cg_step_transition </td>
          <td>(</td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname">[], </td>
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        <tr>
          <td class="paramkey"></td>
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          <td class="paramname">, </td>
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          <td></td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname">[], </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname">[]&#160;</td>
        </tr>
        <tr>
          <td></td>
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<h2 class="memtitle"><span class="permalink"><a href="#ab0b377e0dc63a7d79602643a6ee827c9">&#9670;&nbsp;</a></span>__logregr_igd_result()</h2>

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          <td class="memname">__logregr_result __logregr_igd_result </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state</em></td><td>)</td>
          <td></td>
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<h2 class="memtitle"><span class="permalink"><a href="#a782cd8580dac58cc0a70d534dd696801">&#9670;&nbsp;</a></span>__logregr_igd_step()</h2>

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          <td class="memname">aggregate float8 [] __logregr_igd_step </td>
          <td>(</td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname"><em>y</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>x</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>previous_state</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
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<a id="a993ec0ebec0084170902c0cefc489ae8"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a993ec0ebec0084170902c0cefc489ae8">&#9670;&nbsp;</a></span>__logregr_igd_step_distance()</h2>

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          <td class="memname">float8 __logregr_igd_step_distance </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state1</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state2</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

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<h2 class="memtitle"><span class="permalink"><a href="#a44b3499c913ddcc44b0b9e18e2069fed">&#9670;&nbsp;</a></span>__logregr_igd_step_final()</h2>

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          <td class="memname">float8 [] __logregr_igd_step_final </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state</em></td><td>)</td>
          <td></td>
        </tr>
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<h2 class="memtitle"><span class="permalink"><a href="#a2b23f6e4f9671b511d675c43b42b6544">&#9670;&nbsp;</a></span>__logregr_igd_step_merge_states()</h2>

<div class="memitem">
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          <td class="memname">float8 [] __logregr_igd_step_merge_states </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state1</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state2</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

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<a id="a0f4010cefc479196d2d280514f92e5b0"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a0f4010cefc479196d2d280514f92e5b0">&#9670;&nbsp;</a></span>__logregr_igd_step_transition()</h2>

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          <td class="memname">float8 [] __logregr_igd_step_transition </td>
          <td>(</td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname">[], </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname">, </td>
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        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname">[], </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname">[]&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

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<a id="aaaf5ea72356ebae7e808b54c495bc501"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aaaf5ea72356ebae7e808b54c495bc501">&#9670;&nbsp;</a></span>__logregr_irls_result()</h2>

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          <td class="memname">__logregr_result __logregr_irls_result </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state</em></td><td>)</td>
          <td></td>
        </tr>
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<a id="a7bdf5d39836d8b8826e38a9c15a613c0"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7bdf5d39836d8b8826e38a9c15a613c0">&#9670;&nbsp;</a></span>__logregr_irls_step()</h2>

<div class="memitem">
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          <td class="memname">aggregate float8 [] __logregr_irls_step </td>
          <td>(</td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname"><em>y</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>x</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>previous_state</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
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<h2 class="memtitle"><span class="permalink"><a href="#a56962d63f19d6c4672f9772f6d2b2810">&#9670;&nbsp;</a></span>__logregr_irls_step_distance()</h2>

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          <td class="memname">float8 __logregr_irls_step_distance </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state1</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state2</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

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<h2 class="memtitle"><span class="permalink"><a href="#a45fbe307010fcb5890828e35a398c0a6">&#9670;&nbsp;</a></span>__logregr_irls_step_final()</h2>

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          <td class="memname">float8 [] __logregr_irls_step_final </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
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<h2 class="memtitle"><span class="permalink"><a href="#a2671672fed9d07b5c8c68a63e3d99e5f">&#9670;&nbsp;</a></span>__logregr_irls_step_merge_states()</h2>

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          <td class="memname">float8 [] __logregr_irls_step_merge_states </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state1</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>state2</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

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<h2 class="memtitle"><span class="permalink"><a href="#aa51c257177aa60df02dcf46bac43982e">&#9670;&nbsp;</a></span>__logregr_irls_step_transition()</h2>

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          <td class="memname">float8 [] __logregr_irls_step_transition </td>
          <td>(</td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname">[], </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname">, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname">[], </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname">[]&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
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<h2 class="memtitle"><span class="permalink"><a href="#a4ded9be5c8b111dbb3109efaad83d69e">&#9670;&nbsp;</a></span>logistic()</h2>

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          <td class="memname">float8 logistic </td>
          <td>(</td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname"><em>x</em></td><td>)</td>
          <td></td>
        </tr>
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<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">x</td><td></td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>\( \frac{1}{1 + \exp(-x)} \)</dd></dl>
<p>Evaluating this expression directly can lead to under- or overflows. This function performs the evaluation in a safe manner, making use of the following observations:</p>
<p>In order for the outcome of \( \exp(x) \) to be within the range of the minimum positive double-precision number (i.e., \( 2^{-1074} \)) and the maximum positive double-precision number (i.e., \( (1 + (1 - 2^{52})) * 2^{1023}) \), \( x \) has to be within the natural logarithm of these numbers, so roughly in between -744 and 709. However, \( 1 + \exp(x) \) will just evaluate to 1 if \( \exp(x) \) is less than the machine epsilon (i.e., \( 2^{-52} \)) or, equivalently, if \( x \) is less than the natural logarithm of that; i.e., in any case if \( x \) is less than -37. Note that taking the reciprocal of the largest double-precision number will not cause an underflow. Hence, no further checks are necessary. </p>

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<a id="abb60fcbfa7f13c4b62950b3ae5ee46b2"></a>
<h2 class="memtitle"><span class="permalink"><a href="#abb60fcbfa7f13c4b62950b3ae5ee46b2">&#9670;&nbsp;</a></span>logregr_predict() <span class="overload">[1/3]</span></h2>

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          <td class="memname">boolean logregr_predict </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>coef</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>col_ind_var</em>&#160;</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">coef</td><td>Coefficients obtained by running logistic regression. </td></tr>
    <tr><td class="paramname">col_ind</td><td>Independent variable array </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Boolean value of the dependent variable</dd></dl>
<p>This function computes the dot product of the independent variables and the coefficients. This requires the length of the two vectors to be the same. </p>

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<a id="acc8af7a39e7b0d604c2760d9d6bd0b5e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#acc8af7a39e7b0d604c2760d9d6bd0b5e">&#9670;&nbsp;</a></span>logregr_predict() <span class="overload">[2/3]</span></h2>

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          <td class="memname">text logregr_predict </td>
          <td>(</td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>message</em></td><td>)</td>
          <td></td>
        </tr>
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<h2 class="memtitle"><span class="permalink"><a href="#af3eae2b8acd75d4c6c4db8c79489c58f">&#9670;&nbsp;</a></span>logregr_predict() <span class="overload">[3/3]</span></h2>

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<h2 class="memtitle"><span class="permalink"><a href="#acb8bcffac549a0968f6ee7c2d7f34d5e">&#9670;&nbsp;</a></span>logregr_predict_prob() <span class="overload">[1/3]</span></h2>

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          <td class="memname">float8 logregr_predict_prob </td>
          <td>(</td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>coef</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8 []&#160;</td>
          <td class="paramname"><em>col_ind_var</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
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<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">coef</td><td>Coefficients obtained by running logistic regression. </td></tr>
    <tr><td class="paramname">col_ind</td><td>Independent variable array </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Probability value of the dependent variable being True</dd></dl>
<p>This function computes the dot product of the independent variables and the coefficients, hence requires the length of the two vectors to be the same. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a74210a7ef513dfcbdfdd9f3b37bfe428">&#9670;&nbsp;</a></span>logregr_train() <span class="overload">[1/8]</span></h2>

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          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>out_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>dependent_varname</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>independent_varname</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>grouping_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">integer&#160;</td>
          <td class="paramname"><em>max_iter</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>optimizer</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname"><em>tolerance</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname"><em>verbose</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
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<p>To include an intercept in the model, set one coordinate in the <code>independentVariables</code> array to 1.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">source_table</td><td>Name of the source relation containing the training data </td></tr>
    <tr><td class="paramname">out_table</td><td>Name of the output relation to store the model results <pre class="fragment">              Columns of the output relation are as follows:
               - &lt;tt&gt;coef FLOAT8[]&lt;/tt&gt; - Array of coefficients, \form#79
               - &lt;tt&gt;log_likelihood FLOAT8&lt;/tt&gt; - Log-likelihood \form#80
               - &lt;tt&gt;std_err FLOAT8[]&lt;/tt&gt; - Array of standard errors,
</pre> \( \mathit{se}(c_1), \dots, \mathit{se}(c_k) \)<ul>
<li><code>z_stats FLOAT8[]</code> - Array of Wald z-statistics, \( \boldsymbol z \)</li>
<li><code>p_values FLOAT8[]</code> - Array of Wald p-values, \( \boldsymbol p \)</li>
<li><code>odds_ratios FLOAT8[]</code>: Array of odds ratios, \( \mathit{odds}(c_1), \dots, \mathit{odds}(c_k) \)</li>
<li><code>condition_no FLOAT8</code> - The condition number of matrix \( X^T A X \) during the iteration immediately <em>preceding</em> convergence (i.e., \( A \) is computed using the coefficients of the previous iteration) </li>
</ul>
</td></tr>
    <tr><td class="paramname">dependent_varname</td><td>Name of the dependent column (of type BOOLEAN) </td></tr>
    <tr><td class="paramname">independent_varname</td><td>Name of the independent column (of type DOUBLE PRECISION[]) </td></tr>
    <tr><td class="paramname">grouping_col</td><td>Comma delimited list of column names to group-by </td></tr>
    <tr><td class="paramname">max_iter</td><td>The maximum number of iterations </td></tr>
    <tr><td class="paramname">optimizer</td><td>The optimizer to use (either <code>'irls'</code>/<code>'newton'</code> for iteratively reweighted least squares or <code>'cg'</code> for conjugent gradient) </td></tr>
    <tr><td class="paramname">tolerance</td><td>The difference between log-likelihood values in successive iterations that should indicate convergence. This value should be non-negative and a zero value here disables the convergence criterion, and execution will only stop after <code>maxNumIterations</code> iterations. </td></tr>
    <tr><td class="paramname">verbose</td><td>If true, any error or warning message will be printed to the console (irrespective of the 'client_min_messages' set by server). If false, no error/warning message is printed to console.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section user"><dt>Usage</dt><dd><ul>
<li>Get vector of coefficients \( \boldsymbol c \) and all diagnostic statistics:<br />
 <pre>SELECT logregr_train('<em>sourceName</em>', '<em>outName</em>'
          '<em>dependentVariable</em>', '<em>independentVariables</em>');
         SELECT * from outName;
   </pre></li>
<li>Get vector of coefficients \( \boldsymbol c \):<br />
 <pre>SELECT coef from outName;</pre></li>
<li>Get a subset of the output columns, e.g., only the array of coefficients \( \boldsymbol c \), the log-likelihood of determination \( l(\boldsymbol c) \), and the array of p-values \( \boldsymbol p \): <pre>SELECT coef, log_likelihood, p_values FROM outName;</pre></li>
</ul>
</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function starts an iterative algorithm. It is not an aggregate function. Source, output, and column names have to be passed as strings (due to limitations of the SQL syntax). </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#a58dfa3dc74518179c584ae535e331a7d">&#9670;&nbsp;</a></span>logregr_train() <span class="overload">[2/8]</span></h2>

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          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
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          <td class="paramname"><em>out_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>dependent_varname</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>independent_varname</em>&#160;</td>
        </tr>
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          <td>)</td>
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<h2 class="memtitle"><span class="permalink"><a href="#a327660873183347c9e00bdbd01983a63">&#9670;&nbsp;</a></span>logregr_train() <span class="overload">[3/8]</span></h2>

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          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
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          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>dependent_varname</em>, </td>
        </tr>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>independent_varname</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>grouping_cols</em>&#160;</td>
        </tr>
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<h2 class="memtitle"><span class="permalink"><a href="#a3c217840f2fbe1dcd53ba15c4111b86a">&#9670;&nbsp;</a></span>logregr_train() <span class="overload">[4/8]</span></h2>

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          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>out_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>dependent_varname</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>independent_varname</em>, </td>
        </tr>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>grouping_cols</em>, </td>
        </tr>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">integer&#160;</td>
          <td class="paramname"><em>max_iter</em>&#160;</td>
        </tr>
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          <td>)</td>
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<h2 class="memtitle"><span class="permalink"><a href="#aa321fe6cffa263b1eb612b15e8fb9a6d">&#9670;&nbsp;</a></span>logregr_train() <span class="overload">[5/8]</span></h2>

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          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>out_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>dependent_varname</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>independent_varname</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>grouping_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">integer&#160;</td>
          <td class="paramname"><em>max_iter</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>optimizer</em>&#160;</td>
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<h2 class="memtitle"><span class="permalink"><a href="#a6b5ffd41b8b00e4c4417653250a265fb">&#9670;&nbsp;</a></span>logregr_train() <span class="overload">[6/8]</span></h2>

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          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>out_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>dependent_varname</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>independent_varname</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>grouping_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">integer&#160;</td>
          <td class="paramname"><em>max_iter</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>optimizer</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname"><em>tolerance</em>&#160;</td>
        </tr>
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          <td>)</td>
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