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<title>MADlib: linear.sql_in File Reference</title>
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<div id="projectname">MADlib
&#160;<span id="projectnumber">1.4.1</span>
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<div id="projectbrief">User Documentation</div>
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<a href="#func-members">Functions</a> &#124;
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<div class="title">linear.sql_in File Reference</div> </div>
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<p>SQL functions for linear regression.
<a href="#details">More...</a></p>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:a63acf7128f40d6a0fffd649dd68f5c0f"><td class="memItemLeft" align="right" valign="top">CREATE FUNCTION MADlib&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#a63acf7128f40d6a0fffd649dd68f5c0f">linregr_train</a> (source_table VARCHAR,--name of input table out_table VARCHAR,--name of output table dependent_varname VARCHAR,--name of dependent variable independent_varname VARCHAR,--name of independent variable grouping_cols VARCHAR,--names of columns to group-by heteroskedasticity_option BOOLEAN--do heteroskedasticity test or not) RETURNS VOID <a class="el" href="linear_8sql__in.html#a9d6de4f6e8483f60278bd93c7d0827d6">AS</a> $$PythonFunction(regress</td></tr>
<tr class="memdesc:a63acf7128f40d6a0fffd649dd68f5c0f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Linear regression training function with grouping support. <a href="#a63acf7128f40d6a0fffd649dd68f5c0f">More...</a><br/></td></tr>
<tr class="separator:a63acf7128f40d6a0fffd649dd68f5c0f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:abbd6d104fec0fb6fb54465d1f26d3f27"><td class="memItemLeft" align="right" valign="top">CREATE FUNCTION MADlib&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#abbd6d104fec0fb6fb54465d1f26d3f27">linregr_train</a> (source_table VARCHAR,--name of input table out_table VARCHAR,--name of output table dependent_varname VARCHAR,--name of dependent variable independent_varname VARCHAR,--name of independent variable grouping_cols VARCHAR--names of columns to group-by) RETURNS VOID <a class="el" href="linear_8sql__in.html#a9d6de4f6e8483f60278bd93c7d0827d6">AS</a> $$SELECT MADlib.linregr_train($1</td></tr>
<tr class="separator:abbd6d104fec0fb6fb54465d1f26d3f27"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:afb7d6474fb02e463ce1d7b1d8f4265e3"><td class="memItemLeft" align="right" valign="top">CREATE FUNCTION MADlib&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#afb7d6474fb02e463ce1d7b1d8f4265e3">linregr_train</a> (source_table VARCHAR,--name of input table out_table VARCHAR,--name of output table dependent_varname VARCHAR,--name of dependent variable independent_varname VARCHAR--name of independent variable) RETURNS VOID <a class="el" href="linear_8sql__in.html#a9d6de4f6e8483f60278bd93c7d0827d6">AS</a> $$SELECT MADlib.linregr_train($1</td></tr>
<tr class="separator:afb7d6474fb02e463ce1d7b1d8f4265e3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a2f834f546dc69d1be629cf9e6bc47f95"><td class="memItemLeft" align="right" valign="top">Online help function CREATE OR <br class="typebreak"/>
REPLACE FUNCTION MADlib&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#a2f834f546dc69d1be629cf9e6bc47f95">linregr_train</a> () RETURNS VARCHAR <a class="el" href="linear_8sql__in.html#a9d6de4f6e8483f60278bd93c7d0827d6">AS</a> $$BEGIN RETURN MADlib.linregr_train('')</td></tr>
<tr class="separator:a2f834f546dc69d1be629cf9e6bc47f95"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a440acddc4982d31c7e6d6397b20b6250"><td class="memItemLeft" align="right" valign="top">CREATE OR REPLACE FUNCTION MADlib&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#a440acddc4982d31c7e6d6397b20b6250">linregr_train</a> (message VARCHAR--usage string) RETURNS VARCHAR <a class="el" href="linear_8sql__in.html#a9d6de4f6e8483f60278bd93c7d0827d6">AS</a> $$PythonFunction(regress</td></tr>
<tr class="separator:a440acddc4982d31c7e6d6397b20b6250"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aaff7b488d2c6c80e1d7067bb602bf126"><td class="memItemLeft" align="right" valign="top">Deprecated functions Result <br class="typebreak"/>
Types CREATE TYPE MADlib <br class="typebreak"/>
linregr_result&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#aaff7b488d2c6c80e1d7067bb602bf126">AS</a> (coef DOUBLE PRECISION[], r2 DOUBLE PRECISION, std_err DOUBLE PRECISION[], t_stats DOUBLE PRECISION[], p_values DOUBLE PRECISION[], condition_no DOUBLE PRECISION, num_processed BIGINT)</td></tr>
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<tr class="memitem:a9d6de4f6e8483f60278bd93c7d0827d6"><td class="memItemLeft" align="right" valign="top">CREATE TYPE MADlib <br class="typebreak"/>
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<tr class="memitem:a95c0aba4c24bdcb79b2e74fceb347a82"><td class="memItemLeft" align="right" valign="top">Functions for user defined <br class="typebreak"/>
aggregates normal CREATE OR <br class="typebreak"/>
REPLACE FUNCTION MADlib&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#a95c0aba4c24bdcb79b2e74fceb347a82">linregr_transition</a> (state MADlib.bytea8, y DOUBLE PRECISION, x DOUBLE PRECISION[]) RETURNS MADlib.bytea8 <a class="el" href="linear_8sql__in.html#a9d6de4f6e8483f60278bd93c7d0827d6">AS</a> 'MODULE_PATHNAME'LANGUAGE C IMMUTABLE STRICT</td></tr>
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<tr class="memitem:af49dd93aed686858041eab1b93ba40a7"><td class="memItemLeft" align="right" valign="top">CREATE OR REPLACE FUNCTION MADlib&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#af49dd93aed686858041eab1b93ba40a7">linregr_merge_states</a> (state1 MADlib.bytea8, state2 MADlib.bytea8) RETURNS MADlib.bytea8 <a class="el" href="linear_8sql__in.html#a9d6de4f6e8483f60278bd93c7d0827d6">AS</a> 'MODULE_PATHNAME'LANGUAGE C IMMUTABLE STRICT</td></tr>
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<tr class="memitem:a72e2f6acd90aa3b23a0ec58678920524"><td class="memItemLeft" align="right" valign="top">CREATE OR REPLACE FUNCTION MADlib&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#a72e2f6acd90aa3b23a0ec58678920524">linregr_final</a> (state MADlib.bytea8) RETURNS MADlib.linregr_result <a class="el" href="linear_8sql__in.html#a9d6de4f6e8483f60278bd93c7d0827d6">AS</a> 'MODULE_PATHNAME'LANGUAGE C IMMUTABLE STRICT</td></tr>
<tr class="separator:a72e2f6acd90aa3b23a0ec58678920524"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="var-members"></a>
Variables</h2></td></tr>
<tr class="memitem:a4083381f143fb7e50d1f9af61ef11e1d"><td class="memItemLeft" align="right" valign="top">CREATE FUNCTION MADlib&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#a4083381f143fb7e50d1f9af61ef11e1d">linear</a></td></tr>
<tr class="separator:a4083381f143fb7e50d1f9af61ef11e1d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af87d388a7730bae8ae8bc297959ac99e"><td class="memItemLeft" align="right" valign="top">CREATE FUNCTION MADlib <br class="typebreak"/>
<a class="el" href="linear_8sql__in.html#a440acddc4982d31c7e6d6397b20b6250">linregr_train</a> LANGUAGE&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#af87d388a7730bae8ae8bc297959ac99e">plpythonu</a></td></tr>
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<tr class="memitem:a9480925bcfb23ee418cfc6d2e49914dd"><td class="memItemLeft" align="right" valign="top">CREATE FUNCTION MADlib&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#a9480925bcfb23ee418cfc6d2e49914dd">FALSE</a></td></tr>
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<tr class="memitem:a7e8f2ef77d769bc7c85e5ff69b42ef2d"><td class="memItemLeft" align="right" valign="top">LANGUAGE&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#a7e8f2ef77d769bc7c85e5ff69b42ef2d">sql</a></td></tr>
<tr class="separator:a7e8f2ef77d769bc7c85e5ff69b42ef2d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a1bcd2f9adc5825caadb97a9fe1838b8a"><td class="memItemLeft" align="right" valign="top">CREATE FUNCTION MADlib&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#a1bcd2f9adc5825caadb97a9fe1838b8a">NULL</a></td></tr>
<tr class="separator:a1bcd2f9adc5825caadb97a9fe1838b8a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a1de54bd922161dd5c6a353647f448fd6"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#a1de54bd922161dd5c6a353647f448fd6">END</a></td></tr>
<tr class="separator:a1de54bd922161dd5c6a353647f448fd6"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6eede03831b9fde9b33b9c25dc7c2e1d"><td class="memItemLeft" align="right" valign="top">LANGUAGE plpgsql&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="linear_8sql__in.html#a6eede03831b9fde9b33b9c25dc7c2e1d">VOLATILE</a></td></tr>
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</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="linear_8sql__in.html#a4083381f143fb7e50d1f9af61ef11e1d">linear</a> regression, see the module description <a class="el" href="group__grp__linreg.html">Linear Regression</a>. </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="aaff7b488d2c6c80e1d7067bb602bf126"></a>
<div class="memitem">
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<td class="memname">Deprecated functions Result Types CREATE TYPE MADlib linregr_result AS </td>
<td>(</td>
<td class="paramtype">coef DOUBLE&#160;</td>
<td class="paramname"><em>PRECISION</em>[], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">r2 DOUBLE&#160;</td>
<td class="paramname"><em>PRECISION</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">std_err DOUBLE&#160;</td>
<td class="paramname"><em>PRECISION</em>[], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">t_stats DOUBLE&#160;</td>
<td class="paramname"><em>PRECISION</em>[], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">p_values DOUBLE&#160;</td>
<td class="paramname"><em>PRECISION</em>[], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">condition_no DOUBLE&#160;</td>
<td class="paramname"><em>PRECISION</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">num_processed&#160;</td>
<td class="paramname"><em>BIGINT</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a class="anchor" id="a9d6de4f6e8483f60278bd93c7d0827d6"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">CREATE TYPE MADlib heteroskedasticity_test_result AS </td>
<td>(</td>
<td class="paramtype">bp_stats DOUBLE&#160;</td>
<td class="paramname"><em>PRECISION</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">bp_p_value DOUBLE&#160;</td>
<td class="paramname"><em>PRECISION</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a class="anchor" id="a72e2f6acd90aa3b23a0ec58678920524"></a>
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<td class="memname">CREATE OR REPLACE FUNCTION MADlib linregr_final </td>
<td>(</td>
<td class="paramtype">state MADlib.&#160;</td>
<td class="paramname"><em>bytea8</em>)</td><td></td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a class="anchor" id="af49dd93aed686858041eab1b93ba40a7"></a>
<div class="memitem">
<div class="memproto">
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<td class="memname">CREATE OR REPLACE FUNCTION MADlib linregr_merge_states </td>
<td>(</td>
<td class="paramtype">state1 MADlib.&#160;</td>
<td class="paramname"><em>bytea8</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">state2 MADlib.&#160;</td>
<td class="paramname"><em>bytea8</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a class="anchor" id="a63acf7128f40d6a0fffd649dd68f5c0f"></a>
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<td class="memname">CREATE FUNCTION MADlib linregr_train </td>
<td>(</td>
<td class="paramtype">source_table&#160;</td>
<td class="paramname"><em>VARCHAR</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">--name of input table out_table&#160;</td>
<td class="paramname"><em>VARCHAR</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">--name of output table dependent_varname&#160;</td>
<td class="paramname"><em>VARCHAR</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">--name of dependent variable independent_varname&#160;</td>
<td class="paramname"><em>VARCHAR</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">--name of independent variable grouping_cols&#160;</td>
<td class="paramname"><em>VARCHAR</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">--names of columns to group-by heteroskedasticity_option BOOLEAN--do heteroskedasticity test or&#160;</td>
<td class="paramname"><em>not</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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</table>
</div><div class="memdoc">
</div>
</div>
<a class="anchor" id="abbd6d104fec0fb6fb54465d1f26d3f27"></a>
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<td class="memname">CREATE FUNCTION MADlib linregr_train </td>
<td>(</td>
<td class="paramtype">source_table&#160;</td>
<td class="paramname"><em>VARCHAR</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">--name of input table out_table&#160;</td>
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<td class="paramname"><em>VARCHAR</em>, </td>
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<td class="paramtype">--name of input table out_table&#160;</td>
<td class="paramname"><em>VARCHAR</em>, </td>
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<td class="paramtype">--name of output table dependent_varname&#160;</td>
<td class="paramname"><em>VARCHAR</em>, </td>
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<td class="paramtype">--name of dependent variable independent_varname VARCHAR--name of independent&#160;</td>
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<td class="paramtype">state MADlib.&#160;</td>
<td class="paramname"><em>bytea8</em>, </td>
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<td class="paramtype">y DOUBLE&#160;</td>
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<td class="paramtype">x DOUBLE&#160;</td>
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<h2 class="groupheader">Variable Documentation</h2>
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<td class="memname">END</td>
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<td class="memname">CREATE FUNCTION MADlib <a class="el" href="linear_8sql__in.html#a440acddc4982d31c7e6d6397b20b6250">linregr_train</a> LANGUAGE plpythonu</td>
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<td class="memname">CREATE FUNCTION MADlib TRUE LANGUAGE <a class="el" href="linear_8sql__in.html#a7e8f2ef77d769bc7c85e5ff69b42ef2d">sql</a> VOLATILE</td>
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