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    <title>MATLAB Central Newsreader - Re: how to solve matrix equations system?</title>
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      <pubDate>Mon, 18 Dec 2006 20:58:42 -0500</pubDate>
      <title>Re: how to solve matrix equations system?</title>
      <link>http://www.mathworks.com/matlabcentral/newsreader/view_thread/138163#348135</link>
      <author>Maarten van Reeuwijk</author>
      <description>nirvana26 wrote:&lt;br&gt;
&lt;br&gt;
&amp;gt; thx, Maarten&lt;br&gt;
&amp;gt; &lt;br&gt;
&amp;gt; here, i have more than 2 equations since i got 5 values of a and b. &lt;br&gt;
&lt;br&gt;
But then the system is *over*determined, as this means that you have 10&lt;br&gt;
equations for six unknowns. Only if four of these equations are redundant&lt;br&gt;
will there be a unique solution.&lt;br&gt;
&lt;br&gt;
&amp;gt; I am doing a simulation for high order PMD calculation, actually the&lt;br&gt;
&amp;gt; A0+B0*j is the first order PMD...A2+B2*j is the 3rd order. so i have to&lt;br&gt;
&amp;gt; solve these 6 3*1 matrix.&lt;br&gt;
&lt;br&gt;
If PMD means polarization-mode dispersion then I can better stick with the&lt;br&gt;
mathematics as I have no idea how that works :-)&lt;br&gt;
&lt;br&gt;
HTH, Maarten&lt;br&gt;
&lt;br&gt;
-- &lt;br&gt;
===================================================================&lt;br&gt;
Maarten van Reeuwijk                    dept. of Multiscale Physics&lt;br&gt;
Phd student                             Faculty of Applied Sciences&lt;br&gt;
maarten.vanreeuwijk.net              Delft University of Technology</description>
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