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65<h1>functions.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">//</span>
66<a name="l00002"></a>00002 <span class="comment">// C++ Interface: itpp_ext</span>
67<a name="l00003"></a>00003 <span class="comment">//</span>
68<a name="l00004"></a>00004 <span class="comment">// Description:</span>
69<a name="l00005"></a>00005 <span class="comment">//</span>
70<a name="l00006"></a>00006 <span class="comment">//</span>
71<a name="l00007"></a>00007 <span class="comment">// Author: smidl &lt;smidl@utia.cas.cz&gt;, (C) 2008</span>
72<a name="l00008"></a>00008 <span class="comment">//</span>
73<a name="l00009"></a>00009 <span class="comment">// Copyright: See COPYING file that comes with this distribution</span>
74<a name="l00010"></a>00010 <span class="comment">//</span>
75<a name="l00011"></a>00011 <span class="comment">//</span>
76<a name="l00012"></a>00012 <span class="preprocessor">#ifndef FN_H</span>
77<a name="l00013"></a>00013 <span class="preprocessor"></span><span class="preprocessor">#define FN_H</span>
78<a name="l00014"></a>00014 <span class="preprocessor"></span>
79<a name="l00015"></a>00015 <span class="preprocessor">#include "../base/bdmbase.h"</span>
80<a name="l00016"></a>00016
81<a name="l00017"></a>00017 <span class="keyword">namespace </span>bdm{
82<a name="l00018"></a>00018
83<a name="l00020"></a><a class="code" href="classbdm_1_1constfn.html">00020</a> <span class="keyword">class </span><a class="code" href="classbdm_1_1constfn.html" title="class representing function , here rv is empty">constfn</a> : <span class="keyword">public</span> <a class="code" href="classbdm_1_1fnc.html" title="Class representing function  of variable  represented by rv.">fnc</a>
84<a name="l00021"></a>00021 {
85<a name="l00023"></a>00023                 vec val;
86<a name="l00024"></a>00024
87<a name="l00025"></a>00025         <span class="keyword">public</span>:
88<a name="l00026"></a>00026                 <span class="comment">//vec eval() {return val;};</span>
89<a name="l00028"></a><a class="code" href="classbdm_1_1constfn.html#33c2631ddcad9e81ef4b743d83eed4d4">00028</a> <span class="comment"></span>                vec <a class="code" href="classbdm_1_1constfn.html#33c2631ddcad9e81ef4b743d83eed4d4" title="inherited">eval</a> ( <span class="keyword">const</span> vec &amp;cond ) {<span class="keywordflow">return</span> val;};
90<a name="l00030"></a><a class="code" href="classbdm_1_1constfn.html#7df0693d3ef4f1d2a52a5a3c3fce44af">00030</a>                 <a class="code" href="classbdm_1_1constfn.html#7df0693d3ef4f1d2a52a5a3c3fce44af" title="Default constructor.">constfn</a> ( <span class="keyword">const</span> vec &amp;val0 ) :<a class="code" href="classbdm_1_1fnc.html" title="Class representing function  of variable  represented by rv.">fnc</a>(), val ( val0 ) {<a class="code" href="classbdm_1_1fnc.html#52156cb4a52a62d51fc7455985797a62" title="Length of the output vector.">dimy</a>=val.length();};
91<a name="l00031"></a>00031 };
92<a name="l00032"></a>00032
93<a name="l00034"></a><a class="code" href="classbdm_1_1linfn.html">00034</a> <span class="keyword">class </span><a class="code" href="classbdm_1_1linfn.html" title="Class representing function .">linfn</a>: <span class="keyword">public</span> <a class="code" href="classbdm_1_1fnc.html" title="Class representing function  of variable  represented by rv.">fnc</a>
94<a name="l00035"></a>00035 {
95<a name="l00037"></a>00037                 <a class="code" href="classbdm_1_1RV.html" title="Class representing variables, most often random variables.">RV</a> rv;
96<a name="l00039"></a>00039                 mat A;
97<a name="l00041"></a>00041                 vec B;
98<a name="l00042"></a>00042         <span class="keyword">public</span> :
99<a name="l00043"></a><a class="code" href="classbdm_1_1linfn.html#b8063094a2aa210dcf7ae73e2b85e09c">00043</a>                 vec <a class="code" href="classbdm_1_1linfn.html#b8063094a2aa210dcf7ae73e2b85e09c" title="function evaluates numerical value of  at  cond ">eval</a> (<span class="keyword">const</span> vec &amp;cond ) {it_assert_debug ( cond.length() ==A.cols(), <span class="stringliteral">"linfn::eval Wrong cond."</span> );<span class="keywordflow">return</span> A*cond+B;};
100<a name="l00044"></a>00044
101<a name="l00045"></a>00045 <span class="comment">//              linfn evalsome ( ivec &amp;rvind );</span>
102<a name="l00047"></a><a class="code" href="classbdm_1_1linfn.html#b39c494c12863c031eb2acf86c0bc429">00047</a> <span class="comment"></span>                <a class="code" href="classbdm_1_1linfn.html#b39c494c12863c031eb2acf86c0bc429" title="default constructor">linfn</a> ( ) : <a class="code" href="classbdm_1_1fnc.html" title="Class representing function  of variable  represented by rv.">fnc</a>(), A ( ),B () { };
103<a name="l00049"></a><a class="code" href="classbdm_1_1linfn.html#7e0e714b814532fc3e38daede24c5e68">00049</a>                 <span class="keywordtype">void</span> <a class="code" href="classbdm_1_1linfn.html#7e0e714b814532fc3e38daede24c5e68" title="Set values of A and B.">set_parameters</a> ( <span class="keyword">const</span> mat &amp;A0 , <span class="keyword">const</span> vec &amp;B0 ) {A=A0; B=B0; <a class="code" href="classbdm_1_1fnc.html#52156cb4a52a62d51fc7455985797a62" title="Length of the output vector.">dimy</a>=A.rows();};
104<a name="l00050"></a>00050 };
105<a name="l00051"></a>00051
106<a name="l00052"></a>00052
107<a name="l00062"></a><a class="code" href="classbdm_1_1diffbifn.html">00062</a> <span class="keyword">class </span><a class="code" href="classbdm_1_1diffbifn.html" title="Class representing a differentiable function of two variables .">diffbifn</a>: <span class="keyword">public</span> <a class="code" href="classbdm_1_1fnc.html" title="Class representing function  of variable  represented by rv.">fnc</a>
108<a name="l00063"></a>00063 {
109<a name="l00064"></a>00064         <span class="keyword">protected</span>:
110<a name="l00066"></a><a class="code" href="classbdm_1_1diffbifn.html#5f56547d8e9378b669d3cc19d7831cbb">00066</a>                 <a class="code" href="classbdm_1_1RV.html" title="Class representing variables, most often random variables.">RV</a> <a class="code" href="classbdm_1_1diffbifn.html#5f56547d8e9378b669d3cc19d7831cbb" title="Indentifier of the first rv.">rvx</a>;
111<a name="l00068"></a><a class="code" href="classbdm_1_1diffbifn.html#a8e3e861d5ec2a7ae9524e6338e58320">00068</a>                 <a class="code" href="classbdm_1_1RV.html" title="Class representing variables, most often random variables.">RV</a> <a class="code" href="classbdm_1_1diffbifn.html#a8e3e861d5ec2a7ae9524e6338e58320" title="Indentifier of the second rv.">rvu</a>;
112<a name="l00070"></a><a class="code" href="classbdm_1_1diffbifn.html#a193aa2c4a500139c0c4b669691e588e">00070</a>                 <span class="keywordtype">int</span> <a class="code" href="classbdm_1_1diffbifn.html#a193aa2c4a500139c0c4b669691e588e" title="cache for rvx.count()">dimx</a>;
113<a name="l00072"></a><a class="code" href="classbdm_1_1diffbifn.html#30c45617eec89adeb4ebaa763d093fb0">00072</a>                 <span class="keywordtype">int</span> <a class="code" href="classbdm_1_1diffbifn.html#30c45617eec89adeb4ebaa763d093fb0" title="cache for rvu.count()">dimu</a>;
114<a name="l00073"></a>00073         <span class="keyword">public</span>:
115<a name="l00075"></a><a class="code" href="classbdm_1_1diffbifn.html#188f31066bd72e1bf0ddacd1eb0e6af3">00075</a>                 vec <a class="code" href="classbdm_1_1diffbifn.html#188f31066bd72e1bf0ddacd1eb0e6af3" title="Evaluates  (VS: Do we really need common eval? ).">eval</a> ( <span class="keyword">const</span> vec &amp;cond )
116<a name="l00076"></a>00076                 {
117<a name="l00077"></a>00077                         it_assert_debug ( cond.length() == ( <a class="code" href="classbdm_1_1diffbifn.html#a193aa2c4a500139c0c4b669691e588e" title="cache for rvx.count()">dimx</a>+<a class="code" href="classbdm_1_1diffbifn.html#30c45617eec89adeb4ebaa763d093fb0" title="cache for rvu.count()">dimu</a> ), <span class="stringliteral">"linfn::eval Wrong cond."</span> );
118<a name="l00078"></a>00078                         <span class="keywordflow">return</span> <a class="code" href="classbdm_1_1diffbifn.html#188f31066bd72e1bf0ddacd1eb0e6af3" title="Evaluates  (VS: Do we really need common eval? ).">eval</a> ( cond ( 0,<a class="code" href="classbdm_1_1diffbifn.html#a193aa2c4a500139c0c4b669691e588e" title="cache for rvx.count()">dimx</a>-1 ),cond ( <a class="code" href="classbdm_1_1diffbifn.html#a193aa2c4a500139c0c4b669691e588e" title="cache for rvx.count()">dimx</a>,<a class="code" href="classbdm_1_1diffbifn.html#a193aa2c4a500139c0c4b669691e588e" title="cache for rvx.count()">dimx</a>+<a class="code" href="classbdm_1_1diffbifn.html#30c45617eec89adeb4ebaa763d093fb0" title="cache for rvu.count()">dimu</a>-1 ) );<span class="comment">//-1 = end (in matlab)</span>
119<a name="l00079"></a>00079                 };
120<a name="l00080"></a>00080
121<a name="l00082"></a><a class="code" href="classbdm_1_1diffbifn.html#b5462c05b58cd38367ff946836bb82d3">00082</a>                 <span class="keyword">virtual</span> vec <a class="code" href="classbdm_1_1diffbifn.html#b5462c05b58cd38367ff946836bb82d3" title="Evaluates .">eval</a> ( <span class="keyword">const</span> vec &amp;x0, <span class="keyword">const</span> vec &amp;u0 ) {<span class="keywordflow">return</span> zeros ( <a class="code" href="classbdm_1_1fnc.html#52156cb4a52a62d51fc7455985797a62" title="Length of the output vector.">dimy</a> );};
122<a name="l00084"></a><a class="code" href="classbdm_1_1diffbifn.html#651184f808a35f236dbfea21aca1b6ac">00084</a>                 <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classbdm_1_1diffbifn.html#651184f808a35f236dbfea21aca1b6ac" title="Evaluates  and writes result into A .">dfdx_cond</a> ( <span class="keyword">const</span> vec &amp;x0, <span class="keyword">const</span> vec &amp;u0, mat &amp;A , <span class="keywordtype">bool</span> full=<span class="keyword">true</span> ) {};
123<a name="l00086"></a><a class="code" href="classbdm_1_1diffbifn.html#6ea1dc7a482601b29c5ba36a52d20d07">00086</a>                 <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classbdm_1_1diffbifn.html#6ea1dc7a482601b29c5ba36a52d20d07" title="Evaluates  and writes result into A .">dfdu_cond</a> ( <span class="keyword">const</span> vec &amp;x0, <span class="keyword">const</span> vec &amp;u0, mat &amp;A, <span class="keywordtype">bool</span> full=<span class="keyword">true</span> ) {};
124<a name="l00088"></a><a class="code" href="classbdm_1_1diffbifn.html#92ff29d748e445b440453a38d0b09681">00088</a>                 <a class="code" href="classbdm_1_1diffbifn.html#92ff29d748e445b440453a38d0b09681" title="Default constructor (dimy is not set!).">diffbifn</a> () : <a class="code" href="classbdm_1_1fnc.html" title="Class representing function  of variable  represented by rv.">fnc</a>() {};
125<a name="l00090"></a><a class="code" href="classbdm_1_1diffbifn.html#1b3c8f5949f13d86d2661e191d4b369b">00090</a>                 <span class="keywordtype">int</span> <a class="code" href="classbdm_1_1diffbifn.html#1b3c8f5949f13d86d2661e191d4b369b" title="access function">_dimx</a>()<span class="keyword"> const</span>{<span class="keywordflow">return</span> <a class="code" href="classbdm_1_1diffbifn.html#a193aa2c4a500139c0c4b669691e588e" title="cache for rvx.count()">dimx</a>;}
126<a name="l00092"></a><a class="code" href="classbdm_1_1diffbifn.html#031458f38c97cdb3aecde16f6a06dced">00092</a>                 <span class="keywordtype">int</span> <a class="code" href="classbdm_1_1diffbifn.html#031458f38c97cdb3aecde16f6a06dced" title="access function">_dimu</a>()<span class="keyword"> const</span>{<span class="keywordflow">return</span> <a class="code" href="classbdm_1_1diffbifn.html#30c45617eec89adeb4ebaa763d093fb0" title="cache for rvu.count()">dimu</a>;}
127<a name="l00093"></a>00093 };
128<a name="l00094"></a>00094
129<a name="l00096"></a>00096 <span class="comment">//TODO can be generalized into multilinear form!</span>
130<a name="l00097"></a><a class="code" href="classbdm_1_1bilinfn.html">00097</a> <span class="keyword">class </span><a class="code" href="classbdm_1_1bilinfn.html" title="Class representing function .">bilinfn</a>: <span class="keyword">public</span> <a class="code" href="classbdm_1_1diffbifn.html" title="Class representing a differentiable function of two variables .">diffbifn</a>
131<a name="l00098"></a>00098 {
132<a name="l00099"></a>00099                 mat A;
133<a name="l00100"></a>00100                 mat B;
134<a name="l00101"></a>00101         <span class="keyword">public</span> :
135<a name="l00104"></a>00104                 
136<a name="l00105"></a>00105                 <a class="code" href="classbdm_1_1bilinfn.html" title="Class representing function .">bilinfn</a> () : <a class="code" href="classbdm_1_1diffbifn.html#92ff29d748e445b440453a38d0b09681" title="Default constructor (dimy is not set!).">diffbifn</a> () ,A() ,B()      {};
137<a name="l00106"></a>00106                 <a class="code" href="classbdm_1_1bilinfn.html" title="Class representing function .">bilinfn</a> (<span class="keyword">const</span> mat A0, <span class="keyword">const</span> mat B0) {<a class="code" href="classbdm_1_1bilinfn.html#5a508fbb5fc013904d9b62b2231442de" title="Alternative constructor.">set_parameters</a>(A0,B0);};
138<a name="l00108"></a><a class="code" href="classbdm_1_1bilinfn.html#5a508fbb5fc013904d9b62b2231442de">00108</a>                 <span class="keywordtype">void</span> <a class="code" href="classbdm_1_1bilinfn.html#5a508fbb5fc013904d9b62b2231442de" title="Alternative constructor.">set_parameters</a>(<span class="keyword">const</span> mat A0, <span class="keyword">const</span> mat B0){
139<a name="l00109"></a>00109                         it_assert_debug(A0.rows()==B0.rows(),<span class="stringliteral">""</span>);
140<a name="l00110"></a>00110                         A=A0;B=B0;
141<a name="l00111"></a>00111                         <a class="code" href="classbdm_1_1fnc.html#52156cb4a52a62d51fc7455985797a62" title="Length of the output vector.">dimy</a>=A.rows();
142<a name="l00112"></a>00112                         <a class="code" href="classbdm_1_1diffbifn.html#a193aa2c4a500139c0c4b669691e588e" title="cache for rvx.count()">dimx</a>=A.cols();
143<a name="l00113"></a>00113                         <a class="code" href="classbdm_1_1diffbifn.html#30c45617eec89adeb4ebaa763d093fb0" title="cache for rvu.count()">dimu</a>=B.cols();
144<a name="l00114"></a>00114                 }
145<a name="l00116"></a>00116                 
146<a name="l00119"></a><a class="code" href="classbdm_1_1bilinfn.html#846c21e8e8d41555eb7c075f5ff86ffd">00119</a>                 <span class="keyword">inline</span> vec <a class="code" href="classbdm_1_1bilinfn.html#846c21e8e8d41555eb7c075f5ff86ffd" title="Evaluates .">eval</a> ( <span class="keyword">const</span>  vec &amp;x0, <span class="keyword">const</span> vec &amp;u0 )
147<a name="l00120"></a>00120                 {
148<a name="l00121"></a>00121                         it_assert_debug ( x0.length() ==<a class="code" href="classbdm_1_1diffbifn.html#a193aa2c4a500139c0c4b669691e588e" title="cache for rvx.count()">dimx</a>, <span class="stringliteral">"linfn::eval Wrong xcond."</span> );
149<a name="l00122"></a>00122                         it_assert_debug ( u0.length() ==<a class="code" href="classbdm_1_1diffbifn.html#30c45617eec89adeb4ebaa763d093fb0" title="cache for rvu.count()">dimu</a>, <span class="stringliteral">"linfn::eval Wrong ucond."</span> );
150<a name="l00123"></a>00123                         <span class="keywordflow">return</span> A*x0+B*u0;
151<a name="l00124"></a>00124                 }
152<a name="l00125"></a>00125
153<a name="l00126"></a><a class="code" href="classbdm_1_1bilinfn.html#33066f1054dd259df2ec5fafae4b46e6">00126</a>                 <span class="keywordtype">void</span> <a class="code" href="classbdm_1_1bilinfn.html#33066f1054dd259df2ec5fafae4b46e6" title="Evaluates  and writes result into A .">dfdx_cond</a> ( <span class="keyword">const</span> vec &amp;x0, <span class="keyword">const</span> vec &amp;u0, mat &amp;F, <span class="keywordtype">bool</span> full )
154<a name="l00127"></a>00127                 {
155<a name="l00128"></a>00128                         it_assert_debug ( ( F.cols() ==A.cols() ) &amp; ( F.rows() ==A.rows() ),<span class="stringliteral">"Allocated F is not compatible."</span> );
156<a name="l00129"></a>00129                         <span class="keywordflow">if</span> ( full ) F=A;        <span class="comment">//else : nothing has changed no need to regenerate</span>
157<a name="l00130"></a>00130                 }
158<a name="l00132"></a><a class="code" href="classbdm_1_1bilinfn.html#9cfe2f1c115ba7c3c75849a10a4f2c08">00132</a>                 <span class="keywordtype">void</span> <a class="code" href="classbdm_1_1bilinfn.html#9cfe2f1c115ba7c3c75849a10a4f2c08" title="Evaluates  and writes result into A .">dfdu_cond</a> ( <span class="keyword">const</span> vec &amp;x0, <span class="keyword">const</span> vec &amp;u0, mat &amp;F,  <span class="keywordtype">bool</span> full=<span class="keyword">true</span> )
159<a name="l00133"></a>00133                 {
160<a name="l00134"></a>00134                         it_assert_debug ( ( F.cols() ==B.cols() ) &amp; ( F.rows() ==B.rows() ),<span class="stringliteral">"Allocated F is not compatible."</span> );
161<a name="l00135"></a>00135                         <span class="keywordflow">if</span> ( full ) F=B;        <span class="comment">//else : nothing has changed no need to regenerate</span>
162<a name="l00136"></a>00136                 }
163<a name="l00138"></a>00138 };
164<a name="l00139"></a>00139
165<a name="l00140"></a>00140 } <span class="comment">//namespace</span>
166<a name="l00141"></a>00141 <span class="preprocessor">#endif // FN_H</span>
167</pre></div></div>
168<hr size="1"><address style="text-align: right;"><small>Generated on Wed Jul 1 13:05:55 2009 for mixpp by&nbsp;
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