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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" --><code>#include &lt;<a class="el" href="emix_8h-source.html">emix.h</a>&gt;</code>
72<p>
73<div class="dynheader">
74Inheritance diagram for bdm::mratio:</div>
75<div class="dynsection">
76
77<p><center><img src="classbdm_1_1mratio.png" usemap="#bdm::mratio_map" border="0" alt=""></center>
78<map name="bdm::mratio_map">
79<area href="classbdm_1_1mpdf.html" alt="bdm::mpdf" shape="rect" coords="0,56,86,80">
80<area href="classbdm_1_1bdmroot.html" alt="bdm::bdmroot" shape="rect" coords="0,0,86,24">
81</map>
82</div>
83
84<p>
85<a href="classbdm_1_1mratio-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
86Class representing ratio of two densities which arise e.g. by applying the Bayes rule. It represents density in the form: <p class="formulaDsp">
87<img class="formulaDsp" alt="\[ f(rv|rvc) = \frac{f(rv,rvc)}{f(rvc)} \]" src="form_35.png">
88<p>
89 where <img class="formulaInl" alt="$ f(rvc) = \int f(rv,rvc) d\ rv $" src="form_36.png">.
90<p>
91In particular this type of arise by conditioning of a mixture model.<p>
92At 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>. <table border="0" cellpadding="0" cellspacing="0">
93<tr><td></td></tr>
94<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
95<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>
96
97<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)" -->
98double&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>
99
100<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>
101<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="c8b39fea586d4258bb3c881406edaf15"></a><!-- doxytag: member="bdm::mratio::ownnom" ref="c8b39fea586d4258bb3c881406edaf15" args="()" -->
102void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mratio.html#c8b39fea586d4258bb3c881406edaf15">ownnom</a> ()</td></tr>
103
104<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Object takes ownership of nom and will destroy it. <br></td></tr>
105<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="c0cc0b25dbdc54751466616655454c5c"></a><!-- doxytag: member="bdm::mratio::~mratio" ref="c0cc0b25dbdc54751466616655454c5c" args="()" -->
106&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mratio.html#c0cc0b25dbdc54751466616655454c5c">~mratio</a> ()</td></tr>
107
108<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Default destructor. <br></td></tr>
109<tr><td colspan="2"><div class="groupHeader">Matematical operations</div></td></tr>
110<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>
111
112<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_46.png">.  <a href="#f0c1db6fcbb3aae2dd6123884457a367"></a><br></td></tr>
113<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>
114
115<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Returns.  <a href="#afe4185b26baeb03688202e254d3b005"></a><br></td></tr>
116<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)" -->
117virtual 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>
118
119<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>
120<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)" -->
121virtual 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>
122
123<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Matrix version of evallogcond. <br></td></tr>
124<tr><td colspan="2"><div class="groupHeader">Access to attributes</div></td></tr>
125<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5571482d150fbcb72cc36f6694ce1a10"></a><!-- doxytag: member="bdm::mratio::_rv" ref="5571482d150fbcb72cc36f6694ce1a10" args="()" -->
126<a class="el" href="classbdm_1_1RV.html">RV</a>&nbsp;</td><td class="memItemRight" valign="bottom"><b>_rv</b> ()</td></tr>
127
128<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="26001264236846897bd11e4baad47245"></a><!-- doxytag: member="bdm::mratio::_rvc" ref="26001264236846897bd11e4baad47245" args="()" -->
129<a class="el" href="classbdm_1_1RV.html">RV</a>&nbsp;</td><td class="memItemRight" valign="bottom"><b>_rvc</b> ()</td></tr>
130
131<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="1c2bae3e1e90874e72941863974ec0ed"></a><!-- doxytag: member="bdm::mratio::dimension" ref="1c2bae3e1e90874e72941863974ec0ed" args="()" -->
132int&nbsp;</td><td class="memItemRight" valign="bottom"><b>dimension</b> ()</td></tr>
133
134<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="35e135910aed187b7290742f50e61bc8"></a><!-- doxytag: member="bdm::mratio::dimensionc" ref="35e135910aed187b7290742f50e61bc8" args="()" -->
135int&nbsp;</td><td class="memItemRight" valign="bottom"><b>dimensionc</b> ()</td></tr>
136
137<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="1892fe3933488942253679f068e9e7f6"></a><!-- doxytag: member="bdm::mratio::_epdf" ref="1892fe3933488942253679f068e9e7f6" args="()" -->
138<a class="el" href="classbdm_1_1epdf.html">epdf</a> &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><b>_epdf</b> ()</td></tr>
139
140<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="05e843fd11c410a99dad2b88c55aca80"></a><!-- doxytag: member="bdm::mratio::_e" ref="05e843fd11c410a99dad2b88c55aca80" args="()" -->
141<a class="el" href="classbdm_1_1epdf.html">epdf</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><b>_e</b> ()</td></tr>
142
143<tr><td colspan="2"><div class="groupHeader">Connection to other objects</div></td></tr>
144<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)" -->
145void&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>
146
147<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)" -->
148void&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>
149
150<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f8e3798150b42fd1f3e16ddbbe0e7045"></a><!-- doxytag: member="bdm::mratio::isnamed" ref="f8e3798150b42fd1f3e16ddbbe0e7045" args="()" -->
151bool&nbsp;</td><td class="memItemRight" valign="bottom"><b>isnamed</b> ()</td></tr>
152
153<tr><td colspan="2"><br><h2>Protected Attributes</h2></td></tr>
154<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f31caba90a2aa10fbf7631832404fe54"></a><!-- doxytag: member="bdm::mratio::nom" ref="f31caba90a2aa10fbf7631832404fe54" args="" -->
155const <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>
156
157<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>
158<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="7daa5d02d3a3be9d15fd4156d886ed88"></a><!-- doxytag: member="bdm::mratio::den" ref="7daa5d02d3a3be9d15fd4156d886ed88" args="" -->
159<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>
160
161<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>
162<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="51bfe6675e724f7fbeaaeacce5a9f9b8"></a><!-- doxytag: member="bdm::mratio::destroynom" ref="51bfe6675e724f7fbeaaeacce5a9f9b8" args="" -->
163bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mratio.html#51bfe6675e724f7fbeaaeacce5a9f9b8">destroynom</a></td></tr>
164
165<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">flag for destructor <br></td></tr>
166<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="cda5bd23ba60146d69e1f804ff7710c7"></a><!-- doxytag: member="bdm::mratio::dl" ref="cda5bd23ba60146d69e1f804ff7710c7" args="" -->
167<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>
168
169<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>
170<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="7c1900976ff13dbc09c9729b3bbff9e6"></a><!-- doxytag: member="bdm::mratio::dimc" ref="7c1900976ff13dbc09c9729b3bbff9e6" args="" -->
171int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#7c1900976ff13dbc09c9729b3bbff9e6">dimc</a></td></tr>
172
173<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">dimension of the condition <br></td></tr>
174<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5a5f08950daa08b85b01ddf4e1c36288"></a><!-- doxytag: member="bdm::mratio::rvc" ref="5a5f08950daa08b85b01ddf4e1c36288" args="" -->
175<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>
176
177<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">random variable in condition <br></td></tr>
178<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5eea43c56d38e4441bfb30270db949c0"></a><!-- doxytag: member="bdm::mratio::ep" ref="5eea43c56d38e4441bfb30270db949c0" args="" -->
179<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>
180
181<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>
182</table>
183<hr><h2>Constructor &amp; Destructor Documentation</h2>
184<a class="anchor" name="0ff56d13f9515d7e5f23b7a4cc5529b4"></a><!-- doxytag: member="bdm::mratio::mratio" ref="0ff56d13f9515d7e5f23b7a4cc5529b4" args="(const epdf *nom0, const RV &amp;rv, bool copy=false)" -->
185<div class="memitem">
186<div class="memproto">
187      <table class="memname">
188        <tr>
189          <td class="memname">bdm::mratio::mratio           </td>
190          <td>(</td>
191          <td class="paramtype">const <a class="el" href="classbdm_1_1epdf.html">epdf</a> *&nbsp;</td>
192          <td class="paramname"> <em>nom0</em>, </td>
193        </tr>
194        <tr>
195          <td class="paramkey"></td>
196          <td></td>
197          <td class="paramtype">const <a class="el" href="classbdm_1_1RV.html">RV</a> &amp;&nbsp;</td>
198          <td class="paramname"> <em>rv</em>, </td>
199        </tr>
200        <tr>
201          <td class="paramkey"></td>
202          <td></td>
203          <td class="paramtype">bool&nbsp;</td>
204          <td class="paramname"> <em>copy</em> = <code>false</code></td><td>&nbsp;</td>
205        </tr>
206        <tr>
207          <td></td>
208          <td>)</td>
209          <td></td><td></td><td><code> [inline]</code></td>
210        </tr>
211      </table>
212</div>
213<div class="memdoc">
214
215<p>
216Default 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.
217<p>References <a class="el" href="libBM_8h-source.html#l00274">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#l00297">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#l00295">bdm::mpdf::rvc</a>, <a class="el" href="libBM_8h-source.html#l00270">bdm::epdf::set_rv()</a>, and <a class="el" href="libBM_8cpp-source.html#l00184">bdm::RV::subt()</a>.</p>
218
219</div>
220</div><p>
221<hr><h2>Member Function Documentation</h2>
222<a class="anchor" name="f0c1db6fcbb3aae2dd6123884457a367"></a><!-- doxytag: member="bdm::mratio::samplecond" ref="f0c1db6fcbb3aae2dd6123884457a367" args="(const vec &amp;cond)" -->
223<div class="memitem">
224<div class="memproto">
225      <table class="memname">
226        <tr>
227          <td class="memname">virtual vec bdm::mpdf::samplecond           </td>
228          <td>(</td>
229          <td class="paramtype">const vec &amp;&nbsp;</td>
230          <td class="paramname"> <em>cond</em>          </td>
231          <td>&nbsp;)&nbsp;</td>
232          <td><code> [inline, virtual, inherited]</code></td>
233        </tr>
234      </table>
235</div>
236<div class="memdoc">
237
238<p>
239Returns a sample from the density conditioned on <code>cond</code>, <img class="formulaInl" alt="$x \sim epdf(rv|cond)$" src="form_46.png">.
240<p>
241<dl compact><dt><b>Parameters:</b></dt><dd>
242  <table border="0" cellspacing="2" cellpadding="0">
243    <tr><td valign="top"></td><td valign="top"><em>cond</em>&nbsp;</td><td>is numeric value of <code>rv</code> </td></tr>
244  </table>
245</dl>
246
247<p>Reimplemented in <a class="el" href="classbdm_1_1mprod.html#ee715a8013acf9892f6cb489db595555">bdm::mprod</a>.</p>
248
249<p>References <a class="el" href="libBM_8h-source.html#l00324">bdm::mpdf::condition()</a>, <a class="el" href="libBM_8h-source.html#l00297">bdm::mpdf::ep</a>, and <a class="el" href="libBM_8h-source.html#l00242">bdm::epdf::sample()</a>.</p>
250
251<p>Referenced by <a class="el" href="libPF_8h-source.html#l00148">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#l00043">bdm::ArxDS::step()</a>.</p>
252
253</div>
254</div><p>
255<a class="anchor" name="afe4185b26baeb03688202e254d3b005"></a><!-- doxytag: member="bdm::mratio::samplecond_m" ref="afe4185b26baeb03688202e254d3b005" args="(const vec &amp;cond, int N)" -->
256<div class="memitem">
257<div class="memproto">
258      <table class="memname">
259        <tr>
260          <td class="memname">virtual mat bdm::mpdf::samplecond_m           </td>
261          <td>(</td>
262          <td class="paramtype">const vec &amp;&nbsp;</td>
263          <td class="paramname"> <em>cond</em>, </td>
264        </tr>
265        <tr>
266          <td class="paramkey"></td>
267          <td></td>
268          <td class="paramtype">int&nbsp;</td>
269          <td class="paramname"> <em>N</em></td><td>&nbsp;</td>
270        </tr>
271        <tr>
272          <td></td>
273          <td>)</td>
274          <td></td><td></td><td><code> [inline, virtual, inherited]</code></td>
275        </tr>
276      </table>
277</div>
278<div class="memdoc">
279
280<p>
281Returns.
282<p>
283<dl compact><dt><b>Parameters:</b></dt><dd>
284  <table border="0" cellspacing="2" cellpadding="0">
285    <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_46.png">. </td></tr>
286    <tr><td valign="top"></td><td valign="top"><em>cond</em>&nbsp;</td><td>is numeric value of <code>rv</code> </td></tr>
287    <tr><td valign="top"></td><td valign="top"><em>ll</em>&nbsp;</td><td>is a return value of log-likelihood of the sample. </td></tr>
288  </table>
289</dl>
290
291<p>References <a class="el" href="libBM_8h-source.html#l00324">bdm::mpdf::condition()</a>, <a class="el" href="libBM_8h-source.html#l00281">bdm::epdf::dimension()</a>, <a class="el" href="libBM_8h-source.html#l00297">bdm::mpdf::ep</a>, and <a class="el" href="libBM_8h-source.html#l00242">bdm::epdf::sample()</a>.</p>
292
293</div>
294</div><p>
295<hr>The documentation for this class was generated from the following file:<ul>
296<li><a class="el" href="emix_8h-source.html">emix.h</a></ul>
297</div>
298<hr size="1"><address style="text-align: right;"><small>Generated on Mon Feb 16 10:06:35 2009 for mixpp by&nbsp;
299<a href="http://www.doxygen.org/index.html">
300<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.6 </small></address>
301</body>
302</html>
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