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66  <div class="navpath"><b>bdm</b>::<a class="el" href="classbdm_1_1ARX.html">ARX</a>
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69<div class="contents">
70<h1>bdm::ARX Class Reference</h1><!-- doxytag: class="bdm::ARX" --><!-- doxytag: inherits="bdm::BMEF" -->Linear Autoregressive model with Gaussian noise. 
71<a href="#_details">More...</a>
72<p>
73<code>#include &lt;<a class="el" href="arx_8h_source.html">arx.h</a>&gt;</code>
74<p>
75
76<p>
77<a href="classbdm_1_1ARX-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
78<tr><td></td></tr>
79<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
80<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="539f9d0127423c94b912708d390e67b8"></a><!-- doxytag: member="bdm::ARX::set_statistics" ref="539f9d0127423c94b912708d390e67b8" args="(const BMEF *BM0)" -->
81void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#539f9d0127423c94b912708d390e67b8">set_statistics</a> (const <a class="el" href="classbdm_1_1BMEF.html">BMEF</a> *BM0)</td></tr>
82
83<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Set sufficient statistics. <br></td></tr>
84<tr><td class="memItemLeft" nowrap align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#9637412df898048bafaefee9dc7e9f6c">from_setting</a> (const Setting &amp;set)</td></tr>
85
86<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5b4ae27fa320a1b6e09777239210566d"></a><!-- doxytag: member="bdm::ARX::validate" ref="5b4ae27fa320a1b6e09777239210566d" args="()" -->
87void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#5b4ae27fa320a1b6e09777239210566d">validate</a> ()</td></tr>
88
89<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">This method TODO. <br></td></tr>
90<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="af0e6941ba5919cae1bc530e2181b109"></a><!-- doxytag: member="bdm::ARX::to_string" ref="af0e6941ba5919cae1bc530e2181b109" args="()" -->
91virtual string&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1root.html#af0e6941ba5919cae1bc530e2181b109">to_string</a> ()</td></tr>
92
93<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">This method returns a basic info about the current instance. <br></td></tr>
94<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="67d954d255ede776eade7334d4895790"></a><!-- doxytag: member="bdm::ARX::to_setting" ref="67d954d255ede776eade7334d4895790" args="(Setting &amp;set) const " -->
95virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1root.html#67d954d255ede776eade7334d4895790">to_setting</a> (Setting &amp;set) const </td></tr>
96
97<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">This method save all the instance properties into the Setting structure. <br></td></tr>
98<tr><td colspan="2"><div class="groupHeader">Constructors</div></td></tr>
99<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="43ed6114f04a3a8756fe2b42eaa35f98"></a><!-- doxytag: member="bdm::ARX::ARX" ref="43ed6114f04a3a8756fe2b42eaa35f98" args="(const double frg0=1.0)" -->
100&nbsp;</td><td class="memItemRight" valign="bottom"><b>ARX</b> (const double frg0=1.0)</td></tr>
101
102<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="73a55a3d66bfbeeee4df6c2ae40920ed"></a><!-- doxytag: member="bdm::ARX::ARX" ref="73a55a3d66bfbeeee4df6c2ae40920ed" args="(const ARX &amp;A0)" -->
103&nbsp;</td><td class="memItemRight" valign="bottom"><b>ARX</b> (const <a class="el" href="classbdm_1_1ARX.html">ARX</a> &amp;A0)</td></tr>
104
105<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classbdm_1_1ARX.html">ARX</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#ca0b54c0997cfd567f49377af5def106">_copy_</a> () const </td></tr>
106
107<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="7aef6fe827f15427d534e6fb2c220e04"></a><!-- doxytag: member="bdm::ARX::set_parameters" ref="7aef6fe827f15427d534e6fb2c220e04" args="(double frg0)" -->
108void&nbsp;</td><td class="memItemRight" valign="bottom"><b>set_parameters</b> (double frg0)</td></tr>
109
110<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="e31eec34926437fe362b01ef7077d6f5"></a><!-- doxytag: member="bdm::ARX::set_constant" ref="e31eec34926437fe362b01ef7077d6f5" args="(bool const0)" -->
111void&nbsp;</td><td class="memItemRight" valign="bottom"><b>set_constant</b> (bool const0)</td></tr>
112
113<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f859f53eab269845a9064bbd92f841af"></a><!-- doxytag: member="bdm::ARX::set_statistics" ref="f859f53eab269845a9064bbd92f841af" args="(int dimx0, const ldmat V0, double nu0=&#45;1.0)" -->
114void&nbsp;</td><td class="memItemRight" valign="bottom"><b>set_statistics</b> (int dimx0, const <a class="el" href="classbdm_1_1ldmat.html">ldmat</a> V0, double nu0=-1.0)</td></tr>
115
116<tr><td colspan="2"><div class="groupHeader">Mathematical operations</div></td></tr>
117<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="17e7fe14654ab3c449846c3f43e66169"></a><!-- doxytag: member="bdm::ARX::bayes" ref="17e7fe14654ab3c449846c3f43e66169" args="(const vec &amp;dt, const double w)" -->
118void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#17e7fe14654ab3c449846c3f43e66169">bayes</a> (const vec &amp;dt, const double w)</td></tr>
119
120<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Weighted Bayes <img class="formulaInl" alt="$ dt = [y_t psi_t] $" src="form_35.png">. <br></td></tr>
121<tr><td class="memItemLeft" nowrap align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#8bdf2974052e8ce74eb0d4f3791c58a3">bayes</a> (const vec &amp;dt)</td></tr>
122
123<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Incremental Bayes rule.  <a href="#8bdf2974052e8ce74eb0d4f3791c58a3"></a><br></td></tr>
124<tr><td class="memItemLeft" nowrap align="right" valign="top">double&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#080a7e531e3aa06694112863b15bc6a4">logpred</a> (const vec &amp;dt) const </td></tr>
125
126<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="e86ab499b116b837d3163ec852961eca"></a><!-- doxytag: member="bdm::ARX::flatten" ref="e86ab499b116b837d3163ec852961eca" args="(const BMEF *B)" -->
127void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#e86ab499b116b837d3163ec852961eca">flatten</a> (const <a class="el" href="classbdm_1_1BMEF.html">BMEF</a> *B)</td></tr>
128
129<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Flatten the posterior according to the given <a class="el" href="classbdm_1_1BMEF.html" title="Estimator for Exponential family.">BMEF</a> (of the same type!). <br></td></tr>
130<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="749827323c034f11bec61b6e2fc3d42a"></a><!-- doxytag: member="bdm::ARX::epredictor" ref="749827323c034f11bec61b6e2fc3d42a" args="(const vec &amp;rgr) const " -->
131<a class="el" href="classbdm_1_1enorm.html">enorm</a>&lt; <a class="el" href="classbdm_1_1ldmat.html">ldmat</a> &gt; *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#749827323c034f11bec61b6e2fc3d42a">epredictor</a> (const vec &amp;rgr) const </td></tr>
132
133<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Conditioned version of the predictor. <br></td></tr>
134<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="4cdf5e2a7d3480ec31f6247ed4289b15"></a><!-- doxytag: member="bdm::ARX::epredictor" ref="4cdf5e2a7d3480ec31f6247ed4289b15" args="() const " -->
135<a class="el" href="classbdm_1_1enorm.html">enorm</a>&lt; <a class="el" href="classbdm_1_1ldmat.html">ldmat</a> &gt; *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#4cdf5e2a7d3480ec31f6247ed4289b15">epredictor</a> () const </td></tr>
136
137<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Predictor for empty regressor. <br></td></tr>
138<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="74fe8ae2d88bee8639510fd0eaf73513"></a><!-- doxytag: member="bdm::ARX::predictor" ref="74fe8ae2d88bee8639510fd0eaf73513" args="() const " -->
139<a class="el" href="classbdm_1_1mlnorm.html">mlnorm</a>&lt; <a class="el" href="classbdm_1_1ldmat.html">ldmat</a> &gt; *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#74fe8ae2d88bee8639510fd0eaf73513">predictor</a> () const </td></tr>
140
141<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">conditional version of the predictor <br></td></tr>
142<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="c6a2428a46407fe45b4c7a99069c0801"></a><!-- doxytag: member="bdm::ARX::predictor_student" ref="c6a2428a46407fe45b4c7a99069c0801" args="() const " -->
143<a class="el" href="classbdm_1_1mlstudent.html">mlstudent</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><b>predictor_student</b> () const </td></tr>
144
145<tr><td class="memItemLeft" nowrap align="right" valign="top">ivec&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#16b02ae03316751664c22d59d90c1e34">structure_est</a> (<a class="el" href="classbdm_1_1egiw.html">egiw</a> Eg0)</td></tr>
146
147<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Brute force structure estimation.  <a href="#16b02ae03316751664c22d59d90c1e34"></a><br></td></tr>
148<tr><td class="memItemLeft" nowrap align="right" valign="top">ivec&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#5d0f217ce270e6a8cb43a67b6c4b67fa">structure_est_LT</a> (<a class="el" href="classbdm_1_1egiw.html">egiw</a> Eg0)</td></tr>
149
150<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Smarter structure estimation by Ludvik Tesar.  <a href="#5d0f217ce270e6a8cb43a67b6c4b67fa"></a><br></td></tr>
151<tr><td colspan="2"><div class="groupHeader">Access attributes</div></td></tr>
152<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5a96a50d212648f049122a31d9553618"></a><!-- doxytag: member="bdm::ARX::posterior" ref="5a96a50d212648f049122a31d9553618" args="() const " -->
153const <a class="el" href="classbdm_1_1egiw.html">egiw</a> &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><b>posterior</b> () const </td></tr>
154
155<tr><td colspan="2"><div class="groupHeader">Connection</div></td></tr>
156<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f357c693b640fc0094e3bd56f180ff94"></a><!-- doxytag: member="bdm::ARX::set_rv" ref="f357c693b640fc0094e3bd56f180ff94" args="(const RV &amp;yrv0, const RV &amp;rgrrv0)" -->
157void&nbsp;</td><td class="memItemRight" valign="bottom"><b>set_rv</b> (const <a class="el" href="classbdm_1_1RV.html">RV</a> &amp;yrv0, const <a class="el" href="classbdm_1_1RV.html">RV</a> &amp;rgrrv0)</td></tr>
158
159<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="7b96872783ab72e135b7b9ee26ef0577"></a><!-- doxytag: member="bdm::ARX::get_yrv" ref="7b96872783ab72e135b7b9ee26ef0577" args="()" -->
160<a class="el" href="classbdm_1_1RV.html">RV</a> &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><b>get_yrv</b> ()</td></tr>
161
162<tr><td colspan="2"><div class="groupHeader">Mathematical operations</div></td></tr>
163<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="1dee3fddaf021e62d925289660a707dc"></a><!-- doxytag: member="bdm::ARX::bayesB" ref="1dee3fddaf021e62d925289660a707dc" args="(const mat &amp;Dt)" -->
164virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BM.html#1dee3fddaf021e62d925289660a707dc">bayesB</a> (const mat &amp;Dt)</td></tr>
165
166<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Batch Bayes rule (columns of Dt are observations). <br></td></tr>
167<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="0e8ebe61fb14990abe1254bd3dda5fae"></a><!-- doxytag: member="bdm::ARX::logpred_m" ref="0e8ebe61fb14990abe1254bd3dda5fae" args="(const mat &amp;dt) const " -->
168vec&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BM.html#0e8ebe61fb14990abe1254bd3dda5fae">logpred_m</a> (const mat &amp;dt) const </td></tr>
169
170<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Matrix version of logpred. <br></td></tr>
171<tr><td colspan="2"><div class="groupHeader">Access to attributes</div></td></tr>
172<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ff2d8755ba0b3def927d31305c03b09c"></a><!-- doxytag: member="bdm::ARX::_drv" ref="ff2d8755ba0b3def927d31305c03b09c" args="() const " -->
173const <a class="el" href="classbdm_1_1RV.html">RV</a> &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><b>_drv</b> () const </td></tr>
174
175<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f135ae6dce7e9f30c9f88229c7930b96"></a><!-- doxytag: member="bdm::ARX::set_drv" ref="f135ae6dce7e9f30c9f88229c7930b96" args="(const RV &amp;rv)" -->
176void&nbsp;</td><td class="memItemRight" valign="bottom"><b>set_drv</b> (const <a class="el" href="classbdm_1_1RV.html">RV</a> &amp;rv)</td></tr>
177
178<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="b38d92f17620813ad872d86e01a26e5e"></a><!-- doxytag: member="bdm::ARX::set_rv" ref="b38d92f17620813ad872d86e01a26e5e" args="(const RV &amp;rv)" -->
179void&nbsp;</td><td class="memItemRight" valign="bottom"><b>set_rv</b> (const <a class="el" href="classbdm_1_1RV.html">RV</a> &amp;rv)</td></tr>
180
181<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5be65d37dedfe33a3671e7065f523a70"></a><!-- doxytag: member="bdm::ARX::_ll" ref="5be65d37dedfe33a3671e7065f523a70" args="() const " -->
182double&nbsp;</td><td class="memItemRight" valign="bottom"><b>_ll</b> () const </td></tr>
183
184<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="236b3abbcc93594fc97cd86d82c1a83f"></a><!-- doxytag: member="bdm::ARX::set_evalll" ref="236b3abbcc93594fc97cd86d82c1a83f" args="(bool evl0)" -->
185void&nbsp;</td><td class="memItemRight" valign="bottom"><b>set_evalll</b> (bool evl0)</td></tr>
186
187<tr><td colspan="2"><br><h2>Protected Attributes</h2></td></tr>
188<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="8e68db2a218d54b09304cad6c0a897d9"></a><!-- doxytag: member="bdm::ARX::dimx" ref="8e68db2a218d54b09304cad6c0a897d9" args="" -->
189int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#8e68db2a218d54b09304cad6c0a897d9">dimx</a></td></tr>
190
191<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">size of output variable (needed in regressors) <br></td></tr>
192<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classbdm_1_1RV.html">RV</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#363aaa55b2ab3eec602510cdf53e84ef">_yrv</a></td></tr>
193
194<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="320ac7b3b511bc4b26e8f8823026a453"></a><!-- doxytag: member="bdm::ARX::rgrrv" ref="320ac7b3b511bc4b26e8f8823026a453" args="" -->
195<a class="el" href="classbdm_1_1RV.html">RV</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#320ac7b3b511bc4b26e8f8823026a453">rgrrv</a></td></tr>
196
197<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">rv of regressor <br></td></tr>
198<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="11474a627367f81b76830cb8477cf026"></a><!-- doxytag: member="bdm::ARX::est" ref="11474a627367f81b76830cb8477cf026" args="" -->
199<a class="el" href="classbdm_1_1egiw.html">egiw</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#11474a627367f81b76830cb8477cf026">est</a></td></tr>
200
201<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Posterior estimate of <img class="formulaInl" alt="$\theta,r$" src="form_34.png"> in the form of Normal-inverse Wishart density. <br></td></tr>
202<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="de5b7d83ff5d3f5af2f80068db0abdfd"></a><!-- doxytag: member="bdm::ARX::V" ref="de5b7d83ff5d3f5af2f80068db0abdfd" args="" -->
203<a class="el" href="classbdm_1_1ldmat.html">ldmat</a> &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#de5b7d83ff5d3f5af2f80068db0abdfd">V</a></td></tr>
204
205<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">cached value of est.V <br></td></tr>
206<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="740b0582f180ba13cae91d66e9bdb67f"></a><!-- doxytag: member="bdm::ARX::nu" ref="740b0582f180ba13cae91d66e9bdb67f" args="" -->
207double &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#740b0582f180ba13cae91d66e9bdb67f">nu</a></td></tr>
208
209<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">cached value of est.nu <br></td></tr>
210<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="6dcf8458bdc25d831542c6da89961fbc"></a><!-- doxytag: member="bdm::ARX::have_constant" ref="6dcf8458bdc25d831542c6da89961fbc" args="" -->
211bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#6dcf8458bdc25d831542c6da89961fbc">have_constant</a></td></tr>
212
213<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">switch if constant is modelled or not <br></td></tr>
214<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="8f87c2958e5690610fed2992d6ffe5c0"></a><!-- doxytag: member="bdm::ARX::_dt" ref="8f87c2958e5690610fed2992d6ffe5c0" args="" -->
215vec&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#8f87c2958e5690610fed2992d6ffe5c0">_dt</a></td></tr>
216
217<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">cached value of data vector for have_constant =true <br></td></tr>
218<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a6b50507d9e7a56b38e549710ffb466d"></a><!-- doxytag: member="bdm::ARX::alter_est" ref="a6b50507d9e7a56b38e549710ffb466d" args="" -->
219<a class="el" href="classbdm_1_1egiw.html">egiw</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1ARX.html#a6b50507d9e7a56b38e549710ffb466d">alter_est</a></td></tr>
220
221<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Alternative estimate of parameters, used in stabilized forgetting, see [Kulhavy]. <br></td></tr>
222<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="1331865e10fb1ccef65bb4c47fa3be64"></a><!-- doxytag: member="bdm::ARX::frg" ref="1331865e10fb1ccef65bb4c47fa3be64" args="" -->
223double&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BMEF.html#1331865e10fb1ccef65bb4c47fa3be64">frg</a></td></tr>
224
225<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">forgetting factor <br></td></tr>
226<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="06e7b3ac03e10017d4288c76888e2865"></a><!-- doxytag: member="bdm::ARX::last_lognc" ref="06e7b3ac03e10017d4288c76888e2865" args="" -->
227double&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BMEF.html#06e7b3ac03e10017d4288c76888e2865">last_lognc</a></td></tr>
228
229<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">cached value of lognc() in the previous step (used in evaluation of <code>ll</code> ) <br></td></tr>
230<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="c400357e37d27a4834b2b1d9211009ed"></a><!-- doxytag: member="bdm::ARX::drv" ref="c400357e37d27a4834b2b1d9211009ed" args="" -->
231<a class="el" href="classbdm_1_1RV.html">RV</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BM.html#c400357e37d27a4834b2b1d9211009ed">drv</a></td></tr>
232
233<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Random variable of the data (optional). <br></td></tr>
234<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="4064b6559d962633e4372b12f4cd204a"></a><!-- doxytag: member="bdm::ARX::ll" ref="4064b6559d962633e4372b12f4cd204a" args="" -->
235double&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BM.html#4064b6559d962633e4372b12f4cd204a">ll</a></td></tr>
236
237<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Logarithm of marginalized data likelihood. <br></td></tr>
238<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="faff0ad12556fe7dc0e2807d4fd938ee"></a><!-- doxytag: member="bdm::ARX::evalll" ref="faff0ad12556fe7dc0e2807d4fd938ee" args="" -->
239bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BM.html#faff0ad12556fe7dc0e2807d4fd938ee">evalll</a></td></tr>
240
241<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">If true, the filter will compute likelihood of the data record and store it in <code>ll</code> . Set to false if you want to save computational time. <br></td></tr>
242<tr><td colspan="2"><br><h2>Extension to conditional BM</h2></td></tr>
243<tr><td colspan="2">This extension is useful e.g. in Marginalized Particle Filter (<a class="el" href="classbdm_1_1MPF.html">bdm::MPF</a>). Alternatively, it can be used for automated connection to <a class="el" href="classbdm_1_1DS.html" title="Abstract class for discrete-time sources of data.">DS</a> when the condition is observed <br><br></td></tr>
244<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="b5e8e016be16e4029c789063cb3f3b33"></a><!-- doxytag: member="bdm::ARX::_rvc" ref="b5e8e016be16e4029c789063cb3f3b33" args="() const " -->
245const <a class="el" href="classbdm_1_1RV.html">RV</a> &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BM.html#b5e8e016be16e4029c789063cb3f3b33">_rvc</a> () const </td></tr>
246
247<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">access function <br></td></tr>
248<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="6799f4b16a6a59ed58b1d0d6e17116f4"></a><!-- doxytag: member="bdm::ARX::condition" ref="6799f4b16a6a59ed58b1d0d6e17116f4" args="(const vec &amp;val)" -->
249virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BM.html#6799f4b16a6a59ed58b1d0d6e17116f4">condition</a> (const vec &amp;val)</td></tr>
250
251<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Substitute <code>val</code> for <code>rvc</code>. <br></td></tr>
252<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="de95c590d650b2db423d53992f0906cb"></a><!-- doxytag: member="bdm::ARX::rvc" ref="de95c590d650b2db423d53992f0906cb" args="" -->
253<a class="el" href="classbdm_1_1RV.html">RV</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BM.html#de95c590d650b2db423d53992f0906cb">rvc</a></td></tr>
254
255<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Name of extension variable. <br></td></tr>
256<tr><td colspan="2"><br><h2>Logging of results</h2></td></tr>
257<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="adb539fa2585c8a2a91c54e5aebf330e"></a><!-- doxytag: member="bdm::ARX::set_options" ref="adb539fa2585c8a2a91c54e5aebf330e" args="(const string &amp;opt)" -->
258virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BM.html#adb539fa2585c8a2a91c54e5aebf330e">set_options</a> (const string &amp;opt)</td></tr>
259
260<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Set boolean options from a string, recognized are: "logbounds,logll". <br></td></tr>
261<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="2298ca6af9b13a78a4c9e18ab43f1827"></a><!-- doxytag: member="bdm::ARX::log_add" ref="2298ca6af9b13a78a4c9e18ab43f1827" args="(logger &amp;L, const string &amp;name=&quot;&quot;)" -->
262virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BM.html#2298ca6af9b13a78a4c9e18ab43f1827">log_add</a> (<a class="el" href="classbdm_1_1logger.html">logger</a> &amp;L, const string &amp;name=&quot;&quot;)</td></tr>
263
264<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Add all logged variables to a <a class="el" href="classbdm_1_1logger.html" title="Class for storing results (and semi-results) of an experiment.">logger</a>. <br></td></tr>
265<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="b517e1679eaa94e803ea4cd0b8efbcd7"></a><!-- doxytag: member="bdm::ARX::logit" ref="b517e1679eaa94e803ea4cd0b8efbcd7" args="(logger &amp;L)" -->
266virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><b>logit</b> (<a class="el" href="classbdm_1_1logger.html">logger</a> &amp;L)</td></tr>
267
268<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="109c1a626a69031658e3a44e9e500cca"></a><!-- doxytag: member="bdm::ARX::LIDs" ref="109c1a626a69031658e3a44e9e500cca" args="" -->
269ivec&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BM.html#109c1a626a69031658e3a44e9e500cca">LIDs</a></td></tr>
270
271<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">IDs of storages in loggers 4:[1=mean,2=lb,3=ub,4=ll]. <br></td></tr>
272<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="398b7e7a162cf37d0022d6126495f207"></a><!-- doxytag: member="bdm::ARX::LFlags" ref="398b7e7a162cf37d0022d6126495f207" args="" -->
273ivec&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1BM.html#398b7e7a162cf37d0022d6126495f207">LFlags</a></td></tr>
274
275<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Flags for logging - same size as LIDs, each entry correspond to the same in LIDs. <br></td></tr>
276</table>
277<hr><a name="_details"></a><h2>Detailed Description</h2>
278Linear Autoregressive model with Gaussian noise.
279<p>
280Regression of the following kind: <p class="formulaDsp">
281<img class="formulaDsp" alt="\[ y_t = \theta_1 \psi_1 + \theta_2 + \psi_2 +\ldots + \theta_n \psi_n + r e_t \]" src="form_28.png">
282<p>
283 where unknown parameters <code>rv</code> are <img class="formulaInl" alt="$[\theta r]$" src="form_29.png">, regression vector <img class="formulaInl" alt="$\psi=\psi(y_{1:t},u_{1:t})$" src="form_30.png"> is a known function of past outputs and exogeneous variables <img class="formulaInl" alt="$u_t$" src="form_31.png">. Distrubances <img class="formulaInl" alt="$e_t$" src="form_32.png"> are supposed to be normally distributed: <p class="formulaDsp">
284<img class="formulaDsp" alt="\[ e_t \sim \mathcal{N}(0,1). \]" src="form_33.png">
285<p>
286<p>
287See <a class="el" href="tut_arx.html">Theory of ARX model estimation</a> for mathematical treatment.<p>
288The easiest way how to use the class is: <div class="fragment"><pre class="fragment"><span class="preprocessor">#include "<a class="code" href="arx_8h.html" title="Bayesian Filtering for generalized autoregressive (ARX) model.">estim/arx.h</a>"</span>
289<span class="keyword">using namespace </span>bdm;
290
291<span class="comment">// estimation of AR(0) model</span>
292<span class="keywordtype">int</span> main() {
293        <span class="comment">//prior</span>
294        mat V0 = 0.00001 * eye ( 2 );
295        V0 ( 0, 0 ) = 0.1; <span class="comment">//</span>
296        ARX Ar;
297        Ar.set_statistics ( 1, V0 ); <span class="comment">//nu is default (set to have finite moments)</span>
298        <span class="comment">// forgetting is default: 1.0</span>
299        mat Data = concat_vertical ( randn ( 1, 100 ), ones ( 1, 100 ) );
300        Ar.bayesB ( Data );
301
302        cout &lt;&lt; <span class="stringliteral">"Expected value of Theta is: "</span> &lt;&lt; Ar.posterior().mean() &lt;&lt; endl;
303}
304</pre></div><p>
305<dl class="todo" compact><dt><b><a class="el" href="todo.html#_todo000001">Todo:</a></b></dt><dd>sort out constant terms - bayes should accept vec without additional 1s </dd></dl>
306<hr><h2>Member Function Documentation</h2>
307<a class="anchor" name="ca0b54c0997cfd567f49377af5def106"></a><!-- doxytag: member="bdm::ARX::_copy_" ref="ca0b54c0997cfd567f49377af5def106" args="() const " -->
308<div class="memitem">
309<div class="memproto">
310      <table class="memname">
311        <tr>
312          <td class="memname"><a class="el" href="classbdm_1_1ARX.html">ARX</a> * bdm::ARX::_copy_           </td>
313          <td>(</td>
314          <td class="paramname">          </td>
315          <td>&nbsp;)&nbsp;</td>
316          <td> const<code> [virtual]</code></td>
317        </tr>
318      </table>
319</div>
320<div class="memdoc">
321
322<p>
323Copy function required in vectors, Arrays of <a class="el" href="classbdm_1_1BM.html" title="Bayesian Model of a system, i.e. all uncertainty is modeled by probabilities.">BM</a> etc. Have to be DELETED manually! Prototype: <div class="fragment"><pre class="fragment"> BM* <a class="code" href="classbdm_1_1ARX.html#ca0b54c0997cfd567f49377af5def106">_copy_</a>()<span class="keyword"> const </span>{<span class="keywordflow">return</span> <span class="keyword">new</span> BM(*<span class="keyword">this</span>);}
324</pre></div> 
325<p>Reimplemented from <a class="el" href="classbdm_1_1BMEF.html#62d2e4691bed41a1efa6b9c2e35e5c67">bdm::BMEF</a>.</p>
326
327<p>Reimplemented in <a class="el" href="classbdm_1_1ARXfrg.html#420f3f195d231723f2f2329ec900de60">bdm::ARXfrg</a>.</p>
328
329</div>
330</div><p>
331<a class="anchor" name="8bdf2974052e8ce74eb0d4f3791c58a3"></a><!-- doxytag: member="bdm::ARX::bayes" ref="8bdf2974052e8ce74eb0d4f3791c58a3" args="(const vec &amp;dt)" -->
332<div class="memitem">
333<div class="memproto">
334      <table class="memname">
335        <tr>
336          <td class="memname">void bdm::ARX::bayes           </td>
337          <td>(</td>
338          <td class="paramtype">const vec &amp;&nbsp;</td>
339          <td class="paramname"> <em>dt</em>          </td>
340          <td>&nbsp;)&nbsp;</td>
341          <td><code> [inline, virtual]</code></td>
342        </tr>
343      </table>
344</div>
345<div class="memdoc">
346
347<p>
348Incremental Bayes rule.
349<p>
350<dl compact><dt><b>Parameters:</b></dt><dd>
351  <table border="0" cellspacing="2" cellpadding="0">
352    <tr><td valign="top"></td><td valign="top"><em>dt</em>&nbsp;</td><td>vector of input data </td></tr>
353  </table>
354</dl>
355
356<p>Reimplemented from <a class="el" href="classbdm_1_1BMEF.html#c287f4c0c1ea31b91572ec45351838f1">bdm::BMEF</a>.</p>
357
358<p>References <a class="el" href="arx_8cpp_source.html#l00004">bayes()</a>.</p>
359
360</div>
361</div><p>
362<a class="anchor" name="9637412df898048bafaefee9dc7e9f6c"></a><!-- doxytag: member="bdm::ARX::from_setting" ref="9637412df898048bafaefee9dc7e9f6c" args="(const Setting &amp;set)" -->
363<div class="memitem">
364<div class="memproto">
365      <table class="memname">
366        <tr>
367          <td class="memname">void bdm::ARX::from_setting           </td>
368          <td>(</td>
369          <td class="paramtype">const Setting &amp;&nbsp;</td>
370          <td class="paramname"> <em>set</em>          </td>
371          <td>&nbsp;)&nbsp;</td>
372          <td><code> [virtual]</code></td>
373        </tr>
374      </table>
375</div>
376<div class="memdoc">
377
378<p>
379<a class="el" href="classbdm_1_1UI.html" title="UI is an abstract class which collects all the auxiliary functions useful to prepare...">UI</a> for <a class="el" href="classbdm_1_1ARX.html" title="Linear Autoregressive model with Gaussian noise.">ARX</a> estimator<p>
380<div class="fragment"><pre class="fragment">        <span class="keyword">class </span>= 'ARX';
381        rv    = RV({names_of_dt} )                 <span class="comment">// description of output variables</span>
382        rgr   = RV({names_of_regressors}, [-1,-2]} <span class="comment">// description of regressor variables</span>
383        constant = 1;                              <span class="comment">// 0/1 switch if the constant term is modelled or not</span>
384
385        --- optional ---
386        V0  = [1 0;0 1];                           <span class="comment">// Initial value of information matrix V</span>
387          --- OR ---
388        dV0 = [1e-3, 1e-5, 1e-5, 1e-5];            <span class="comment">// Initial value of diagonal of information matrix V</span>
389                                                                                           <span class="comment">// default: 1e-3 for rv, 1e-5 for rgr</span>
390        nu0 = 6;                                                   <span class="comment">// initial value of nu, default: rgrlen + 2</span>
391        <a class="code" href="classbdm_1_1BMEF.html#1331865e10fb1ccef65bb4c47fa3be64" title="forgetting factor">frg</a> = 1.0;                                 <span class="comment">// forgetting, default frg=1.0</span>
392
393        rv_param   = RV({names_of_parameters}}     <span class="comment">// description of parametetr names </span>
394                                                                                           <span class="comment">// default: ["theta_i" and "r_i"]</span>
395</pre></div> 
396<p>Reimplemented from <a class="el" href="classbdm_1_1BM.html#23c6a8f71f922023ab08dcb0487a86de">bdm::BM</a>.</p>
397
398<p>References <a class="el" href="arx_8h_source.html#l00061">_dt</a>, <a class="el" href="arx_8h_source.html#l00053">est</a>, <a class="el" href="exp__family_8h_source.html#l00084">bdm::BMEF::frg</a>, <a class="el" href="user__info_8h_source.html#l00451">bdm::UI::get()</a>, <a class="el" href="arx_8h_source.html#l00059">have_constant</a>, <a class="el" href="bdmbase_8h_source.html#l01163">bdm::BM::set_options()</a>, <a class="el" href="bdmbase_8h_source.html#l00414">bdm::epdf::set_rv()</a>, and <a class="el" href="arx_8h_source.html#l00176">validate()</a>.</p>
399
400</div>
401</div><p>
402<a class="anchor" name="080a7e531e3aa06694112863b15bc6a4"></a><!-- doxytag: member="bdm::ARX::logpred" ref="080a7e531e3aa06694112863b15bc6a4" args="(const vec &amp;dt) const " -->
403<div class="memitem">
404<div class="memproto">
405      <table class="memname">
406        <tr>
407          <td class="memname">double bdm::ARX::logpred           </td>
408          <td>(</td>
409          <td class="paramtype">const vec &amp;&nbsp;</td>
410          <td class="paramname"> <em>dt</em>          </td>
411          <td>&nbsp;)&nbsp;</td>
412          <td> const<code> [virtual]</code></td>
413        </tr>
414      </table>
415</div>
416<div class="memdoc">
417
418<p>
419Evaluates predictive log-likelihood of the given data record I.e. marginal likelihood of the data with the posterior integrated out.
420<p>Reimplemented from <a class="el" href="classbdm_1_1BM.html#50257e0c1e5b5c73153ea6e716ad8ae0">bdm::BM</a>.</p>
421
422<p>References <a class="el" href="arx_8h_source.html#l00053">est</a>, <a class="el" href="bdmbase_8h_source.html#l01063">bdm::BM::evalll</a>, <a class="el" href="exp__family_8h_source.html#l00084">bdm::BMEF::frg</a>, <a class="el" href="exp__family_8h_source.html#l00086">bdm::BMEF::last_lognc</a>, <a class="el" href="exp__family_8cpp_source.html#l00064">bdm::egiw::lognc()</a>, <a class="el" href="arx_8h_source.html#l00057">nu</a>, <a class="el" href="square__mat_8cpp_source.html#l00074">bdm::ldmat::opupdt()</a>, <a class="el" href="exp__family_8h_source.html#l00237">bdm::egiw::pow()</a>, and <a class="el" href="arx_8h_source.html#l00055">V</a>.</p>
423
424</div>
425</div><p>
426<a class="anchor" name="16b02ae03316751664c22d59d90c1e34"></a><!-- doxytag: member="bdm::ARX::structure_est" ref="16b02ae03316751664c22d59d90c1e34" args="(egiw Eg0)" -->
427<div class="memitem">
428<div class="memproto">
429      <table class="memname">
430        <tr>
431          <td class="memname">ivec bdm::ARX::structure_est           </td>
432          <td>(</td>
433          <td class="paramtype"><a class="el" href="classbdm_1_1egiw.html">egiw</a>&nbsp;</td>
434          <td class="paramname"> <em>Eg0</em>          </td>
435          <td>&nbsp;)&nbsp;</td>
436          <td></td>
437        </tr>
438      </table>
439</div>
440<div class="memdoc">
441
442<p>
443Brute force structure estimation.
444<p>
445<dl class="return" compact><dt><b>Returns:</b></dt><dd>indeces of accepted regressors. </dd></dl>
446
447<p>References <a class="el" href="bdmbase_8h_source.html#l00435">bdm::epdf::dimension()</a>, <a class="el" href="arx_8h_source.html#l00053">est</a>, and <a class="el" href="exp__family_8cpp_source.html#l00064">bdm::egiw::lognc()</a>.</p>
448
449</div>
450</div><p>
451<a class="anchor" name="5d0f217ce270e6a8cb43a67b6c4b67fa"></a><!-- doxytag: member="bdm::ARX::structure_est_LT" ref="5d0f217ce270e6a8cb43a67b6c4b67fa" args="(egiw Eg0)" -->
452<div class="memitem">
453<div class="memproto">
454      <table class="memname">
455        <tr>
456          <td class="memname">ivec bdm::ARX::structure_est_LT           </td>
457          <td>(</td>
458          <td class="paramtype"><a class="el" href="classbdm_1_1egiw.html">egiw</a>&nbsp;</td>
459          <td class="paramname"> <em>Eg0</em>          </td>
460          <td>&nbsp;)&nbsp;</td>
461          <td></td>
462        </tr>
463      </table>
464</div>
465<div class="memdoc">
466
467<p>
468Smarter structure estimation by Ludvik Tesar.
469<p>
470<dl class="return" compact><dt><b>Returns:</b></dt><dd>indeces of accepted regressors. </dd></dl>
471
472</div>
473</div><p>
474<hr><h2>Member Data Documentation</h2>
475<a class="anchor" name="363aaa55b2ab3eec602510cdf53e84ef"></a><!-- doxytag: member="bdm::ARX::_yrv" ref="363aaa55b2ab3eec602510cdf53e84ef" args="" -->
476<div class="memitem">
477<div class="memproto">
478      <table class="memname">
479        <tr>
480          <td class="memname"><a class="el" href="classbdm_1_1RV.html">RV</a> <a class="el" href="classbdm_1_1ARX.html#363aaa55b2ab3eec602510cdf53e84ef">bdm::ARX::_yrv</a><code> [protected]</code>          </td>
481        </tr>
482      </table>
483</div>
484<div class="memdoc">
485
486<p>
487description of modelled data <img class="formulaInl" alt="$ y_t $" src="form_6.png"> in the likelihood function Do NOT access directly, only via <code>get_yrv()</code>.
488<p>Referenced by <a class="el" href="arx_8h_source.html#l00176">validate()</a>.</p>
489
490</div>
491</div><p>
492<hr>The documentation for this class was generated from the following files:<ul>
493<li><a class="el" href="arx_8h_source.html">arx.h</a><li>arx.cpp</ul>
494</div>
495<hr size="1"><address style="text-align: right;"><small>Generated on Wed Oct 7 17:34:46 2009 for mixpp by&nbsp;
496<a href="http://www.doxygen.org/index.html">
497<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.9 </small></address>
498</body>
499</html>
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