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3<title>mixpp: bdm::mratio Class Reference</title>
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67  <div class="navpath"><b>bdm</b>::<a class="el" href="classbdm_1_1mratio.html">mratio</a>
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71<h1>bdm::mratio Class Reference</h1><!-- doxytag: class="bdm::mratio" --><!-- doxytag: inherits="bdm::mpdf" -->Class representing ratio of two densities which arise e.g. by applying the Bayes rule. It represents density in the form: <p class="formulaDsp">
72<img class="formulaDsp" alt="\[ f(rv|rvc) = \frac{f(rv,rvc)}{f(rvc)} \]" src="form_36.png">
73<p>
74 where <img class="formulaInl" alt="$ f(rvc) = \int f(rv,rvc) d\ rv $" src="form_37.png">. 
75<a href="#_details">More...</a>
76<p>
77<code>#include &lt;<a class="el" href="emix_8h-source.html">emix.h</a>&gt;</code>
78<p>
79
80<p>
81<a href="classbdm_1_1mratio-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
82<tr><td></td></tr>
83<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
84<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mratio.html#0ff56d13f9515d7e5f23b7a4cc5529b4">mratio</a> (const <a class="el" href="classbdm_1_1epdf.html">epdf</a> *nom0, const <a class="el" href="classbdm_1_1RV.html">RV</a> &amp;rv, bool copy=false)</td></tr>
85
86<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="3a2cbce8c61ca9f592d9c2220f7c1204"></a><!-- doxytag: member="bdm::mratio::evallogcond" ref="3a2cbce8c61ca9f592d9c2220f7c1204" args="(const vec &amp;val, const vec &amp;cond)" -->
87double&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mratio.html#3a2cbce8c61ca9f592d9c2220f7c1204">evallogcond</a> (const vec &amp;val, const vec &amp;cond)</td></tr>
88
89<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Shortcut for conditioning and evaluation of the internal <a class="el" href="classbdm_1_1epdf.html" title="Probability density function with numerical statistics, e.g. posterior density.">epdf</a>. In some cases, this operation can be implemented efficiently. <br></td></tr>
90<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="c8b39fea586d4258bb3c881406edaf15"></a><!-- doxytag: member="bdm::mratio::ownnom" ref="c8b39fea586d4258bb3c881406edaf15" args="()" -->
91void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mratio.html#c8b39fea586d4258bb3c881406edaf15">ownnom</a> ()</td></tr>
92
93<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Object takes ownership of nom and will destroy it. <br></td></tr>
94<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="c0cc0b25dbdc54751466616655454c5c"></a><!-- doxytag: member="bdm::mratio::~mratio" ref="c0cc0b25dbdc54751466616655454c5c" args="()" -->
95&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mratio.html#c0cc0b25dbdc54751466616655454c5c">~mratio</a> ()</td></tr>
96
97<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Default destructor. <br></td></tr>
98<tr><td colspan="2"><div class="groupHeader">Matematical operations</div></td></tr>
99<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual vec&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#f0c1db6fcbb3aae2dd6123884457a367">samplecond</a> (const vec &amp;cond)</td></tr>
100
101<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Returns a sample from the density conditioned on <code>cond</code>, <img class="formulaInl" alt="$x \sim epdf(rv|cond)$" src="form_50.png">.  <a href="#f0c1db6fcbb3aae2dd6123884457a367"></a><br></td></tr>
102<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual mat&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#afe4185b26baeb03688202e254d3b005">samplecond_m</a> (const vec &amp;cond, int N)</td></tr>
103
104<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Returns.  <a href="#afe4185b26baeb03688202e254d3b005"></a><br></td></tr>
105<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="db94784a9aacf74c65c5a014f6743530"></a><!-- doxytag: member="bdm::mratio::condition" ref="db94784a9aacf74c65c5a014f6743530" args="(const vec &amp;cond)" -->
106virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#db94784a9aacf74c65c5a014f6743530">condition</a> (const vec &amp;cond)</td></tr>
107
108<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Update <code>ep</code> so that it represents this <a class="el" href="classbdm_1_1mpdf.html" title="Conditional probability density, e.g. modeling some dependencies.">mpdf</a> conditioned on <code>rvc</code> = cond. <br></td></tr>
109<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="0b0ed1ed663071bb7cf4a1349eb94fcb"></a><!-- doxytag: member="bdm::mratio::evallogcond_m" ref="0b0ed1ed663071bb7cf4a1349eb94fcb" args="(const mat &amp;Dt, const vec &amp;cond)" -->
110virtual vec&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#0b0ed1ed663071bb7cf4a1349eb94fcb">evallogcond_m</a> (const mat &amp;Dt, const vec &amp;cond)</td></tr>
111
112<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Matrix version of evallogcond. <br></td></tr>
113<tr><td colspan="2"><div class="groupHeader">Access to attributes</div></td></tr>
114<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5571482d150fbcb72cc36f6694ce1a10"></a><!-- doxytag: member="bdm::mratio::_rv" ref="5571482d150fbcb72cc36f6694ce1a10" args="()" -->
115<a class="el" href="classbdm_1_1RV.html">RV</a>&nbsp;</td><td class="memItemRight" valign="bottom"><b>_rv</b> ()</td></tr>
116
117<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="26001264236846897bd11e4baad47245"></a><!-- doxytag: member="bdm::mratio::_rvc" ref="26001264236846897bd11e4baad47245" args="()" -->
118<a class="el" href="classbdm_1_1RV.html">RV</a>&nbsp;</td><td class="memItemRight" valign="bottom"><b>_rvc</b> ()</td></tr>
119
120<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="1c2bae3e1e90874e72941863974ec0ed"></a><!-- doxytag: member="bdm::mratio::dimension" ref="1c2bae3e1e90874e72941863974ec0ed" args="()" -->
121int&nbsp;</td><td class="memItemRight" valign="bottom"><b>dimension</b> ()</td></tr>
122
123<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="35e135910aed187b7290742f50e61bc8"></a><!-- doxytag: member="bdm::mratio::dimensionc" ref="35e135910aed187b7290742f50e61bc8" args="()" -->
124int&nbsp;</td><td class="memItemRight" valign="bottom"><b>dimensionc</b> ()</td></tr>
125
126<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="1892fe3933488942253679f068e9e7f6"></a><!-- doxytag: member="bdm::mratio::_epdf" ref="1892fe3933488942253679f068e9e7f6" args="()" -->
127<a class="el" href="classbdm_1_1epdf.html">epdf</a> &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><b>_epdf</b> ()</td></tr>
128
129<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="05e843fd11c410a99dad2b88c55aca80"></a><!-- doxytag: member="bdm::mratio::_e" ref="05e843fd11c410a99dad2b88c55aca80" args="()" -->
130<a class="el" href="classbdm_1_1epdf.html">epdf</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><b>_e</b> ()</td></tr>
131
132<tr><td colspan="2"><div class="groupHeader">Connection to other objects</div></td></tr>
133<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="7631a5570e4ade1420065e8df78f4401"></a><!-- doxytag: member="bdm::mratio::set_rvc" ref="7631a5570e4ade1420065e8df78f4401" args="(const RV &amp;rvc0)" -->
134void&nbsp;</td><td class="memItemRight" valign="bottom"><b>set_rvc</b> (const <a class="el" href="classbdm_1_1RV.html">RV</a> &amp;rvc0)</td></tr>
135
136<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="18ac26bc2f96ae01ef4eb06178abbd75"></a><!-- doxytag: member="bdm::mratio::set_rv" ref="18ac26bc2f96ae01ef4eb06178abbd75" args="(const RV &amp;rv0)" -->
137void&nbsp;</td><td class="memItemRight" valign="bottom"><b>set_rv</b> (const <a class="el" href="classbdm_1_1RV.html">RV</a> &amp;rv0)</td></tr>
138
139<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f8e3798150b42fd1f3e16ddbbe0e7045"></a><!-- doxytag: member="bdm::mratio::isnamed" ref="f8e3798150b42fd1f3e16ddbbe0e7045" args="()" -->
140bool&nbsp;</td><td class="memItemRight" valign="bottom"><b>isnamed</b> ()</td></tr>
141
142<tr><td colspan="2"><br><h2>Protected Attributes</h2></td></tr>
143<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f31caba90a2aa10fbf7631832404fe54"></a><!-- doxytag: member="bdm::mratio::nom" ref="f31caba90a2aa10fbf7631832404fe54" args="" -->
144const <a class="el" href="classbdm_1_1epdf.html">epdf</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mratio.html#f31caba90a2aa10fbf7631832404fe54">nom</a></td></tr>
145
146<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Nominator in the form of <a class="el" href="classbdm_1_1mpdf.html" title="Conditional probability density, e.g. modeling some dependencies.">mpdf</a>. <br></td></tr>
147<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="7daa5d02d3a3be9d15fd4156d886ed88"></a><!-- doxytag: member="bdm::mratio::den" ref="7daa5d02d3a3be9d15fd4156d886ed88" args="" -->
148<a class="el" href="classbdm_1_1epdf.html">epdf</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mratio.html#7daa5d02d3a3be9d15fd4156d886ed88">den</a></td></tr>
149
150<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Denominator in the form of <a class="el" href="classbdm_1_1epdf.html" title="Probability density function with numerical statistics, e.g. posterior density.">epdf</a>. <br></td></tr>
151<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="51bfe6675e724f7fbeaaeacce5a9f9b8"></a><!-- doxytag: member="bdm::mratio::destroynom" ref="51bfe6675e724f7fbeaaeacce5a9f9b8" args="" -->
152bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mratio.html#51bfe6675e724f7fbeaaeacce5a9f9b8">destroynom</a></td></tr>
153
154<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">flag for destructor <br></td></tr>
155<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="cda5bd23ba60146d69e1f804ff7710c7"></a><!-- doxytag: member="bdm::mratio::dl" ref="cda5bd23ba60146d69e1f804ff7710c7" args="" -->
156<a class="el" href="classbdm_1_1datalink__m2e.html">datalink_m2e</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mratio.html#cda5bd23ba60146d69e1f804ff7710c7">dl</a></td></tr>
157
158<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight"><a class="el" href="classbdm_1_1datalink.html" title="DataLink is a connection between two data vectors Up and Down.">datalink</a> between conditional and nom <br></td></tr>
159<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="7c1900976ff13dbc09c9729b3bbff9e6"></a><!-- doxytag: member="bdm::mratio::dimc" ref="7c1900976ff13dbc09c9729b3bbff9e6" args="" -->
160int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#7c1900976ff13dbc09c9729b3bbff9e6">dimc</a></td></tr>
161
162<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">dimension of the condition <br></td></tr>
163<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5a5f08950daa08b85b01ddf4e1c36288"></a><!-- doxytag: member="bdm::mratio::rvc" ref="5a5f08950daa08b85b01ddf4e1c36288" args="" -->
164<a class="el" href="classbdm_1_1RV.html">RV</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#5a5f08950daa08b85b01ddf4e1c36288">rvc</a></td></tr>
165
166<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">random variable in condition <br></td></tr>
167<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5eea43c56d38e4441bfb30270db949c0"></a><!-- doxytag: member="bdm::mratio::ep" ref="5eea43c56d38e4441bfb30270db949c0" args="" -->
168<a class="el" href="classbdm_1_1epdf.html">epdf</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#5eea43c56d38e4441bfb30270db949c0">ep</a></td></tr>
169
170<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">pointer to internal <a class="el" href="classbdm_1_1epdf.html" title="Probability density function with numerical statistics, e.g. posterior density.">epdf</a> <br></td></tr>
171</table>
172<hr><a name="_details"></a><h2>Detailed Description</h2>
173Class representing ratio of two densities which arise e.g. by applying the Bayes rule. It represents density in the form: <p class="formulaDsp">
174<img class="formulaDsp" alt="\[ f(rv|rvc) = \frac{f(rv,rvc)}{f(rvc)} \]" src="form_36.png">
175<p>
176 where <img class="formulaInl" alt="$ f(rvc) = \int f(rv,rvc) d\ rv $" src="form_37.png">.
177<p>
178In particular this type of arise by conditioning of a mixture model.<p>
179At present the only supported operation is <a class="el" href="classbdm_1_1mratio.html#3a2cbce8c61ca9f592d9c2220f7c1204" title="Shortcut for conditioning and evaluation of the internal epdf. In some cases, this...">evallogcond()</a>. <hr><h2>Constructor &amp; Destructor Documentation</h2>
180<a class="anchor" name="0ff56d13f9515d7e5f23b7a4cc5529b4"></a><!-- doxytag: member="bdm::mratio::mratio" ref="0ff56d13f9515d7e5f23b7a4cc5529b4" args="(const epdf *nom0, const RV &amp;rv, bool copy=false)" -->
181<div class="memitem">
182<div class="memproto">
183      <table class="memname">
184        <tr>
185          <td class="memname">bdm::mratio::mratio           </td>
186          <td>(</td>
187          <td class="paramtype">const <a class="el" href="classbdm_1_1epdf.html">epdf</a> *&nbsp;</td>
188          <td class="paramname"> <em>nom0</em>, </td>
189        </tr>
190        <tr>
191          <td class="paramkey"></td>
192          <td></td>
193          <td class="paramtype">const <a class="el" href="classbdm_1_1RV.html">RV</a> &amp;&nbsp;</td>
194          <td class="paramname"> <em>rv</em>, </td>
195        </tr>
196        <tr>
197          <td class="paramkey"></td>
198          <td></td>
199          <td class="paramtype">bool&nbsp;</td>
200          <td class="paramname"> <em>copy</em> = <code>false</code></td><td>&nbsp;</td>
201        </tr>
202        <tr>
203          <td></td>
204          <td>)</td>
205          <td></td><td></td><td><code> [inline]</code></td>
206        </tr>
207      </table>
208</div>
209<div class="memdoc">
210
211<p>
212Default constructor. By default, the given <a class="el" href="classbdm_1_1epdf.html" title="Probability density function with numerical statistics, e.g. posterior density.">epdf</a> is not copied! It is assumed that this function will be used only temporarily.
213<p>References <a class="el" href="libBM_8h-source.html#l00122">bdm::RV::_dsize()</a>, <a class="el" href="libBM_8h-source.html#l00279">bdm::epdf::_rv()</a>, <a class="el" href="emix_8h-source.html#l00041">den</a>, <a class="el" href="emix_8h-source.html#l00043">destroynom</a>, <a class="el" href="libBM_8h-source.html#l00298">bdm::mpdf::dimc</a>, <a class="el" href="emix_8h-source.html#l00045">dl</a>, <a class="el" href="libBM_8h-source.html#l00302">bdm::mpdf::ep</a>, <a class="el" href="libBM_8h-source.html#l00126">bdm::RV::length()</a>, <a class="el" href="libBM_8h-source.html#l00256">bdm::epdf::marginal()</a>, <a class="el" href="emix_8h-source.html#l00039">nom</a>, <a class="el" href="libBM_8h-source.html#l00300">bdm::mpdf::rvc</a>, <a class="el" href="libBM_8h-source.html#l00437">bdm::datalink_m2e::set_connection()</a>, <a class="el" href="libBM_8h-source.html#l00235">bdm::epdf::set_parameters()</a>, <a class="el" href="libBM_8h-source.html#l00275">bdm::epdf::set_rv()</a>, and <a class="el" href="libBM_8cpp-source.html#l00194">bdm::RV::subt()</a>.</p>
214
215</div>
216</div><p>
217<hr><h2>Member Function Documentation</h2>
218<a class="anchor" name="f0c1db6fcbb3aae2dd6123884457a367"></a><!-- doxytag: member="bdm::mratio::samplecond" ref="f0c1db6fcbb3aae2dd6123884457a367" args="(const vec &amp;cond)" -->
219<div class="memitem">
220<div class="memproto">
221      <table class="memname">
222        <tr>
223          <td class="memname">virtual vec bdm::mpdf::samplecond           </td>
224          <td>(</td>
225          <td class="paramtype">const vec &amp;&nbsp;</td>
226          <td class="paramname"> <em>cond</em>          </td>
227          <td>&nbsp;)&nbsp;</td>
228          <td><code> [inline, virtual, inherited]</code></td>
229        </tr>
230      </table>
231</div>
232<div class="memdoc">
233
234<p>
235Returns a sample from the density conditioned on <code>cond</code>, <img class="formulaInl" alt="$x \sim epdf(rv|cond)$" src="form_50.png">.
236<p>
237<dl compact><dt><b>Parameters:</b></dt><dd>
238  <table border="0" cellspacing="2" cellpadding="0">
239    <tr><td valign="top"></td><td valign="top"><em>cond</em>&nbsp;</td><td>is numeric value of <code>rv</code> </td></tr>
240  </table>
241</dl>
242
243<p>Reimplemented in <a class="el" href="classbdm_1_1mprod.html#ee715a8013acf9892f6cb489db595555">bdm::mprod</a>.</p>
244
245<p>References <a class="el" href="libBM_8h-source.html#l00329">bdm::mpdf::condition()</a>, <a class="el" href="libBM_8h-source.html#l00302">bdm::mpdf::ep</a>, and <a class="el" href="libBM_8h-source.html#l00242">bdm::epdf::sample()</a>.</p>
246
247<p>Referenced by <a class="el" href="libPF_8h-source.html#l00207">bdm::MPF&lt; BM_T &gt;::bayes()</a>, <a class="el" href="libPF_8cpp-source.html#l00007">bdm::PF::bayes()</a>, and <a class="el" href="libDS_8cpp-source.html#l00042">bdm::ArxDS::step()</a>.</p>
248
249</div>
250</div><p>
251<a class="anchor" name="afe4185b26baeb03688202e254d3b005"></a><!-- doxytag: member="bdm::mratio::samplecond_m" ref="afe4185b26baeb03688202e254d3b005" args="(const vec &amp;cond, int N)" -->
252<div class="memitem">
253<div class="memproto">
254      <table class="memname">
255        <tr>
256          <td class="memname">virtual mat bdm::mpdf::samplecond_m           </td>
257          <td>(</td>
258          <td class="paramtype">const vec &amp;&nbsp;</td>
259          <td class="paramname"> <em>cond</em>, </td>
260        </tr>
261        <tr>
262          <td class="paramkey"></td>
263          <td></td>
264          <td class="paramtype">int&nbsp;</td>
265          <td class="paramname"> <em>N</em></td><td>&nbsp;</td>
266        </tr>
267        <tr>
268          <td></td>
269          <td>)</td>
270          <td></td><td></td><td><code> [inline, virtual, inherited]</code></td>
271        </tr>
272      </table>
273</div>
274<div class="memdoc">
275
276<p>
277Returns.
278<p>
279<dl compact><dt><b>Parameters:</b></dt><dd>
280  <table border="0" cellspacing="2" cellpadding="0">
281    <tr><td valign="top"></td><td valign="top"><em>N</em>&nbsp;</td><td>samples from the density conditioned on <code>cond</code>, <img class="formulaInl" alt="$x \sim epdf(rv|cond)$" src="form_50.png">. </td></tr>
282    <tr><td valign="top"></td><td valign="top"><em>cond</em>&nbsp;</td><td>is numeric value of <code>rv</code> </td></tr>
283  </table>
284</dl>
285
286<p>References <a class="el" href="libBM_8h-source.html#l00329">bdm::mpdf::condition()</a>, <a class="el" href="libBM_8h-source.html#l00286">bdm::epdf::dimension()</a>, <a class="el" href="libBM_8h-source.html#l00302">bdm::mpdf::ep</a>, and <a class="el" href="libBM_8h-source.html#l00242">bdm::epdf::sample()</a>.</p>
287
288</div>
289</div><p>
290<hr>The documentation for this class was generated from the following file:<ul>
291<li><a class="el" href="emix_8h-source.html">emix.h</a></ul>
292</div>
293<hr size="1"><address style="text-align: right;"><small>Generated on Thu Apr 23 21:06:45 2009 for mixpp by&nbsp;
294<a href="http://www.doxygen.org/index.html">
295<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.8 </small></address>
296</body>
297</html>
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