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[271] | 67 | <div class="navpath"><b>bdm</b>::<a class="el" href="classbdm_1_1mgamma__fix.html">mgamma_fix</a> |
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[259] | 68 | </div> |
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| 69 | </div> |
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| 70 | <div class="contents"> |
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[290] | 71 | <h1>bdm::mgamma_fix Class Reference</h1><!-- doxytag: class="bdm::mgamma_fix" --><!-- doxytag: inherits="bdm::mgamma" -->Gamma random walk around a fixed point. |
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| 72 | <a href="#_details">More...</a> |
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[259] | 73 | <p> |
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[290] | 74 | <code>#include <<a class="el" href="libEF_8h-source.html">libEF.h</a>></code> |
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| 75 | <p> |
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[259] | 76 | |
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| 77 | <p> |
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[290] | 78 | <a href="classbdm_1_1mgamma__fix-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0"> |
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[259] | 79 | <tr><td></td></tr> |
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| 80 | <tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr> |
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[270] | 81 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="9a31bc9b4b60188a18a2a6b588dc4b2d"></a><!-- doxytag: member="bdm::mgamma_fix::mgamma_fix" ref="9a31bc9b4b60188a18a2a6b588dc4b2d" args="()" --> |
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| 82 | </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mgamma__fix.html#9a31bc9b4b60188a18a2a6b588dc4b2d">mgamma_fix</a> ()</td></tr> |
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[259] | 83 | |
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| 84 | <tr><td class="mdescLeft"> </td><td class="mdescRight">Constructor. <br></td></tr> |
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| 85 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="1bfd30e90db9dc1fbda4a9fbb0b716b2"></a><!-- doxytag: member="bdm::mgamma_fix::set_parameters" ref="1bfd30e90db9dc1fbda4a9fbb0b716b2" args="(double k0, vec ref0, double l0)" --> |
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| 86 | void </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mgamma__fix.html#1bfd30e90db9dc1fbda4a9fbb0b716b2">set_parameters</a> (double k0, vec ref0, double l0)</td></tr> |
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| 87 | |
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| 88 | <tr><td class="mdescLeft"> </td><td class="mdescRight">Set value of <code>k</code>. <br></td></tr> |
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| 89 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="1d539591deb7a38bb3403c2b396c8ff7"></a><!-- doxytag: member="bdm::mgamma_fix::condition" ref="1d539591deb7a38bb3403c2b396c8ff7" args="(const vec &val)" --> |
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| 90 | void </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mgamma__fix.html#1d539591deb7a38bb3403c2b396c8ff7">condition</a> (const vec &val)</td></tr> |
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| 91 | |
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| 92 | <tr><td class="mdescLeft"> </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> |
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[271] | 93 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a0f21c2557b233a85838b497d040ab14"></a><!-- doxytag: member="bdm::mgamma_fix::set_parameters" ref="a0f21c2557b233a85838b497d040ab14" args="(double k, const vec &beta0)" --> |
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| 94 | void </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mgamma.html#a0f21c2557b233a85838b497d040ab14">set_parameters</a> (double <a class="el" href="classbdm_1_1mgamma.html#b20cf88cca1fe9b0b8f2a412608bfd09">k</a>, const vec &beta0)</td></tr> |
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[259] | 95 | |
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| 96 | <tr><td class="mdescLeft"> </td><td class="mdescRight">Set value of <code>k</code>. <br></td></tr> |
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[270] | 97 | <tr><td colspan="2"><div class="groupHeader">Matematical operations</div></td></tr> |
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[269] | 98 | <tr><td class="memItemLeft" nowrap align="right" valign="top">virtual vec </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#f0c1db6fcbb3aae2dd6123884457a367">samplecond</a> (const vec &cond)</td></tr> |
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[259] | 99 | |
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[275] | 100 | <tr><td class="mdescLeft"> </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> |
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[270] | 101 | <tr><td class="memItemLeft" nowrap align="right" valign="top">virtual mat </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#afe4185b26baeb03688202e254d3b005">samplecond_m</a> (const vec &cond, int N)</td></tr> |
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[259] | 102 | |
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[270] | 103 | <tr><td class="mdescLeft"> </td><td class="mdescRight">Returns. <a href="#afe4185b26baeb03688202e254d3b005"></a><br></td></tr> |
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[259] | 104 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="6336a8a72462e2a56a3989a220f18b1b"></a><!-- doxytag: member="bdm::mgamma_fix::evallogcond" ref="6336a8a72462e2a56a3989a220f18b1b" args="(const vec &dt, const vec &cond)" --> |
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| 105 | virtual double </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#6336a8a72462e2a56a3989a220f18b1b">evallogcond</a> (const vec &dt, const vec &cond)</td></tr> |
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| 106 | |
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| 107 | <tr><td class="mdescLeft"> </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> |
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| 108 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="0b0ed1ed663071bb7cf4a1349eb94fcb"></a><!-- doxytag: member="bdm::mgamma_fix::evallogcond_m" ref="0b0ed1ed663071bb7cf4a1349eb94fcb" args="(const mat &Dt, const vec &cond)" --> |
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| 109 | virtual vec </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#0b0ed1ed663071bb7cf4a1349eb94fcb">evallogcond_m</a> (const mat &Dt, const vec &cond)</td></tr> |
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| 110 | |
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| 111 | <tr><td class="mdescLeft"> </td><td class="mdescRight">Matrix version of evallogcond. <br></td></tr> |
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[270] | 112 | <tr><td colspan="2"><div class="groupHeader">Access to attributes</div></td></tr> |
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| 113 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5571482d150fbcb72cc36f6694ce1a10"></a><!-- doxytag: member="bdm::mgamma_fix::_rv" ref="5571482d150fbcb72cc36f6694ce1a10" args="()" --> |
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| 114 | <a class="el" href="classbdm_1_1RV.html">RV</a> </td><td class="memItemRight" valign="bottom"><b>_rv</b> ()</td></tr> |
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[259] | 115 | |
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[270] | 116 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="26001264236846897bd11e4baad47245"></a><!-- doxytag: member="bdm::mgamma_fix::_rvc" ref="26001264236846897bd11e4baad47245" args="()" --> |
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| 117 | <a class="el" href="classbdm_1_1RV.html">RV</a> </td><td class="memItemRight" valign="bottom"><b>_rvc</b> ()</td></tr> |
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[259] | 118 | |
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[270] | 119 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="1c2bae3e1e90874e72941863974ec0ed"></a><!-- doxytag: member="bdm::mgamma_fix::dimension" ref="1c2bae3e1e90874e72941863974ec0ed" args="()" --> |
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| 120 | int </td><td class="memItemRight" valign="bottom"><b>dimension</b> ()</td></tr> |
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| 121 | |
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| 122 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="35e135910aed187b7290742f50e61bc8"></a><!-- doxytag: member="bdm::mgamma_fix::dimensionc" ref="35e135910aed187b7290742f50e61bc8" args="()" --> |
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| 123 | int </td><td class="memItemRight" valign="bottom"><b>dimensionc</b> ()</td></tr> |
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| 124 | |
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[259] | 125 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="1892fe3933488942253679f068e9e7f6"></a><!-- doxytag: member="bdm::mgamma_fix::_epdf" ref="1892fe3933488942253679f068e9e7f6" args="()" --> |
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[270] | 126 | <a class="el" href="classbdm_1_1epdf.html">epdf</a> & </td><td class="memItemRight" valign="bottom"><b>_epdf</b> ()</td></tr> |
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[259] | 127 | |
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| 128 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="05e843fd11c410a99dad2b88c55aca80"></a><!-- doxytag: member="bdm::mgamma_fix::_e" ref="05e843fd11c410a99dad2b88c55aca80" args="()" --> |
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[270] | 129 | <a class="el" href="classbdm_1_1epdf.html">epdf</a> * </td><td class="memItemRight" valign="bottom"><b>_e</b> ()</td></tr> |
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[259] | 130 | |
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[270] | 131 | <tr><td colspan="2"><div class="groupHeader">Connection to other objects</div></td></tr> |
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| 132 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="7631a5570e4ade1420065e8df78f4401"></a><!-- doxytag: member="bdm::mgamma_fix::set_rvc" ref="7631a5570e4ade1420065e8df78f4401" args="(const RV &rvc0)" --> |
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| 133 | void </td><td class="memItemRight" valign="bottom"><b>set_rvc</b> (const <a class="el" href="classbdm_1_1RV.html">RV</a> &rvc0)</td></tr> |
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| 134 | |
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| 135 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="18ac26bc2f96ae01ef4eb06178abbd75"></a><!-- doxytag: member="bdm::mgamma_fix::set_rv" ref="18ac26bc2f96ae01ef4eb06178abbd75" args="(const RV &rv0)" --> |
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| 136 | void </td><td class="memItemRight" valign="bottom"><b>set_rv</b> (const <a class="el" href="classbdm_1_1RV.html">RV</a> &rv0)</td></tr> |
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| 137 | |
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| 138 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f8e3798150b42fd1f3e16ddbbe0e7045"></a><!-- doxytag: member="bdm::mgamma_fix::isnamed" ref="f8e3798150b42fd1f3e16ddbbe0e7045" args="()" --> |
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| 139 | bool </td><td class="memItemRight" valign="bottom"><b>isnamed</b> ()</td></tr> |
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| 140 | |
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[259] | 141 | <tr><td colspan="2"><br><h2>Protected Attributes</h2></td></tr> |
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| 142 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="1eb701506aabb2e6af007e487212d6fa"></a><!-- doxytag: member="bdm::mgamma_fix::l" ref="1eb701506aabb2e6af007e487212d6fa" args="" --> |
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| 143 | double </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mgamma__fix.html#1eb701506aabb2e6af007e487212d6fa">l</a></td></tr> |
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| 144 | |
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| 145 | <tr><td class="mdescLeft"> </td><td class="mdescRight">parameter l <br></td></tr> |
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| 146 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="018c6f901a04e419455308a07eb3b0b2"></a><!-- doxytag: member="bdm::mgamma_fix::refl" ref="018c6f901a04e419455308a07eb3b0b2" args="" --> |
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| 147 | vec </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mgamma__fix.html#018c6f901a04e419455308a07eb3b0b2">refl</a></td></tr> |
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| 148 | |
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| 149 | <tr><td class="mdescLeft"> </td><td class="mdescRight">reference vector <br></td></tr> |
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| 150 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="bdc9f1e9e03c09e91103fee269864438"></a><!-- doxytag: member="bdm::mgamma_fix::epdf" ref="bdc9f1e9e03c09e91103fee269864438" args="" --> |
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| 151 | <a class="el" href="classbdm_1_1egamma.html">egamma</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mgamma.html#bdc9f1e9e03c09e91103fee269864438">epdf</a></td></tr> |
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| 152 | |
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| 153 | <tr><td class="mdescLeft"> </td><td class="mdescRight">Internal <a class="el" href="classbdm_1_1epdf.html" title="Probability density function with numerical statistics, e.g. posterior density.">epdf</a> that arise by conditioning on <code>rvc</code>. <br></td></tr> |
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| 154 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="b20cf88cca1fe9b0b8f2a412608bfd09"></a><!-- doxytag: member="bdm::mgamma_fix::k" ref="b20cf88cca1fe9b0b8f2a412608bfd09" args="" --> |
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| 155 | double </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mgamma.html#b20cf88cca1fe9b0b8f2a412608bfd09">k</a></td></tr> |
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| 156 | |
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[275] | 157 | <tr><td class="mdescLeft"> </td><td class="mdescRight">Constant <img class="formulaInl" alt="$k$" src="form_63.png">. <br></td></tr> |
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[270] | 158 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="3d95f4dde9214ff6dba265e18af60312"></a><!-- doxytag: member="bdm::mgamma_fix::_beta" ref="3d95f4dde9214ff6dba265e18af60312" args="" --> |
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| 159 | vec & </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mgamma.html#3d95f4dde9214ff6dba265e18af60312">_beta</a></td></tr> |
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[259] | 160 | |
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| 161 | <tr><td class="mdescLeft"> </td><td class="mdescRight">cache of epdf.beta <br></td></tr> |
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[270] | 162 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="7c1900976ff13dbc09c9729b3bbff9e6"></a><!-- doxytag: member="bdm::mgamma_fix::dimc" ref="7c1900976ff13dbc09c9729b3bbff9e6" args="" --> |
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| 163 | int </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#7c1900976ff13dbc09c9729b3bbff9e6">dimc</a></td></tr> |
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[259] | 164 | |
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[270] | 165 | <tr><td class="mdescLeft"> </td><td class="mdescRight">dimension of the condition <br></td></tr> |
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[259] | 166 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5a5f08950daa08b85b01ddf4e1c36288"></a><!-- doxytag: member="bdm::mgamma_fix::rvc" ref="5a5f08950daa08b85b01ddf4e1c36288" args="" --> |
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| 167 | <a class="el" href="classbdm_1_1RV.html">RV</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#5a5f08950daa08b85b01ddf4e1c36288">rvc</a></td></tr> |
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| 168 | |
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| 169 | <tr><td class="mdescLeft"> </td><td class="mdescRight">random variable in condition <br></td></tr> |
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| 170 | <tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5eea43c56d38e4441bfb30270db949c0"></a><!-- doxytag: member="bdm::mgamma_fix::ep" ref="5eea43c56d38e4441bfb30270db949c0" args="" --> |
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| 171 | <a class="el" href="classbdm_1_1epdf.html">epdf</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classbdm_1_1mpdf.html#5eea43c56d38e4441bfb30270db949c0">ep</a></td></tr> |
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| 172 | |
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| 173 | <tr><td class="mdescLeft"> </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> |
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| 174 | </table> |
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[290] | 175 | <hr><a name="_details"></a><h2>Detailed Description</h2> |
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| 176 | Gamma random walk around a fixed point. |
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| 177 | <p> |
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| 178 | Mean value, <img class="formulaInl" alt="$\mu$" src="form_62.png">, of this density is given by a geometric combination of <code>rvc</code> and given fixed point, <img class="formulaInl" alt="$p$" src="form_54.png">. <img class="formulaInl" alt="$l$" src="form_72.png"> is the coefficient of the geometric combimation <p class="formulaDsp"> |
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| 179 | <img class="formulaDsp" alt="\[ \mu = \mu_{t-1} ^{l} p^{1-l}\]" src="form_73.png"> |
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| 180 | <p> |
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| 181 | <p> |
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| 182 | Standard deviation of the random walk is proportional to one <img class="formulaInl" alt="$k$" src="form_63.png">-th the mean. This is achieved by setting <img class="formulaInl" alt="$\alpha=k$" src="form_64.png"> and <img class="formulaInl" alt="$\beta=k/\mu$" src="form_65.png">.<p> |
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| 183 | The standard deviation of the walk is then: <img class="formulaInl" alt="$\mu/\sqrt(k)$" src="form_66.png">. <hr><h2>Member Function Documentation</h2> |
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[269] | 184 | <a class="anchor" name="f0c1db6fcbb3aae2dd6123884457a367"></a><!-- doxytag: member="bdm::mgamma_fix::samplecond" ref="f0c1db6fcbb3aae2dd6123884457a367" args="(const vec &cond)" --> |
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[259] | 185 | <div class="memitem"> |
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| 186 | <div class="memproto"> |
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| 187 | <table class="memname"> |
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| 188 | <tr> |
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| 189 | <td class="memname">virtual vec bdm::mpdf::samplecond </td> |
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| 190 | <td>(</td> |
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| 191 | <td class="paramtype">const vec & </td> |
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[269] | 192 | <td class="paramname"> <em>cond</em> </td> |
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| 193 | <td> ) </td> |
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| 194 | <td><code> [inline, virtual, inherited]</code></td> |
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[259] | 195 | </tr> |
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| 196 | </table> |
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| 197 | </div> |
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| 198 | <div class="memdoc"> |
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| 199 | |
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| 200 | <p> |
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[275] | 201 | Returns a sample from the density conditioned on <code>cond</code>, <img class="formulaInl" alt="$x \sim epdf(rv|cond)$" src="form_46.png">. |
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[259] | 202 | <p> |
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| 203 | <dl compact><dt><b>Parameters:</b></dt><dd> |
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| 204 | <table border="0" cellspacing="2" cellpadding="0"> |
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| 205 | <tr><td valign="top"></td><td valign="top"><em>cond</em> </td><td>is numeric value of <code>rv</code> </td></tr> |
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| 206 | </table> |
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| 207 | </dl> |
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| 208 | |
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[271] | 209 | <p>Reimplemented in <a class="el" href="classbdm_1_1mprod.html#ee715a8013acf9892f6cb489db595555">bdm::mprod</a>.</p> |
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[259] | 210 | |
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[287] | 211 | <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> |
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[259] | 212 | |
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[287] | 213 | <p>Referenced by <a class="el" href="libPF_8h-source.html#l00207">bdm::MPF< BM_T >::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> |
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[271] | 214 | |
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[259] | 215 | </div> |
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| 216 | </div><p> |
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[270] | 217 | <a class="anchor" name="afe4185b26baeb03688202e254d3b005"></a><!-- doxytag: member="bdm::mgamma_fix::samplecond_m" ref="afe4185b26baeb03688202e254d3b005" args="(const vec &cond, int N)" --> |
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[259] | 218 | <div class="memitem"> |
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| 219 | <div class="memproto"> |
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| 220 | <table class="memname"> |
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| 221 | <tr> |
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| 222 | <td class="memname">virtual mat bdm::mpdf::samplecond_m </td> |
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| 223 | <td>(</td> |
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| 224 | <td class="paramtype">const vec & </td> |
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| 225 | <td class="paramname"> <em>cond</em>, </td> |
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| 226 | </tr> |
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| 227 | <tr> |
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| 228 | <td class="paramkey"></td> |
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| 229 | <td></td> |
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| 230 | <td class="paramtype">int </td> |
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| 231 | <td class="paramname"> <em>N</em></td><td> </td> |
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| 232 | </tr> |
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| 233 | <tr> |
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| 234 | <td></td> |
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| 235 | <td>)</td> |
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| 236 | <td></td><td></td><td><code> [inline, virtual, inherited]</code></td> |
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| 237 | </tr> |
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| 238 | </table> |
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| 239 | </div> |
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| 240 | <div class="memdoc"> |
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| 241 | |
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| 242 | <p> |
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| 243 | Returns. |
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| 244 | <p> |
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| 245 | <dl compact><dt><b>Parameters:</b></dt><dd> |
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| 246 | <table border="0" cellspacing="2" cellpadding="0"> |
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[275] | 247 | <tr><td valign="top"></td><td valign="top"><em>N</em> </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> |
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[259] | 248 | <tr><td valign="top"></td><td valign="top"><em>cond</em> </td><td>is numeric value of <code>rv</code> </td></tr> |
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| 249 | </table> |
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| 250 | </dl> |
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| 251 | |
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[287] | 252 | <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> |
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[259] | 253 | |
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| 254 | </div> |
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| 255 | </div><p> |
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| 256 | <hr>The documentation for this class was generated from the following file:<ul> |
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[261] | 257 | <li><a class="el" href="libEF_8h-source.html">libEF.h</a></ul> |
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[259] | 258 | </div> |
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[296] | 259 | <hr size="1"><address style="text-align: right;"><small>Generated on Tue Mar 17 13:52:06 2009 for mixpp by |
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[259] | 260 | <a href="http://www.doxygen.org/index.html"> |
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[290] | 261 | <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.8 </small></address> |
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[259] | 262 | </body> |
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| 263 | </html> |
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