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<font face="Calibri">Hello,<br>
<br>
You can use the eigs routine from ARPACK<br>
<a class="moz-txt-link-freetext" href="http://help.scilab.org/docs/5.5.2/en_US/eigs.html">http://help.scilab.org/docs/5.5.2/en_US/eigs.html</a><br>
<br>
An example<br>
</font>
<pre style="font-family:Monospaced;font-style:normal;font-size:16.0;"><span style="color:rgb(0,0,0);">A</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(174,92,176);text-decoration:underline;">sprand</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(188,143,143);">1000</span><span style="color:rgb(0,0,0);">,</span> <span style="color:rgb(188,143,143);">1000</span><span style="color:rgb(0,0,0);">,</span> <span style="color:rgb(188,143,143);">0.02</span><span style="color:rgb(0,0,0);">,</span> <span style="color:rgb(188,143,143);">"</span><span style="color:rgb(188,143,143);">normal</span><span style="color:rgb(188,143,143);">"</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span> <span style="color:rgb(100,174,100);font-style:italic;">// creates a random sparse matrix of size 1000 x 1000 and density 0.02</span>
<span style="color:rgb(74,85,219);">[</span><span style="color:rgb(0,0,0);">d</span><span style="color:rgb(0,0,0);">,</span> <span style="color:rgb(0,0,0);">v</span><span style="color:rgb(74,85,219);">]</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(174,92,176);text-decoration:underline;">eigs</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(0,0,0);">A</span><span style="color:rgb(0,0,0);">,</span> <span style="color:rgb(74,85,219);">[</span><span style="color:rgb(74,85,219);">]</span><span style="color:rgb(0,0,0);">,</span> <span style="color:rgb(188,143,143);">10</span><span style="color:rgb(0,0,0);">,</span> <span style="color:rgb(188,143,143);">"</span><span style="color:rgb(188,143,143);">SM</span><span style="color:rgb(188,143,143);">"</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span> <span style="color:rgb(100,174,100);font-style:italic;">// computes the 10 smallest eigenvalues of A</s
pan></pre>
Hope it helps,<br>
<br>
<div class="moz-cite-prefix">Le 10/06/2015 23:11,
<a class="moz-txt-link-abbreviated" href="mailto:paul.carrico@free.fr">paul.carrico@free.fr</a> a écrit :<br>
</div>
<blockquote
cite="mid:1821059326.532022691.1433970663276.JavaMail.root@zimbra5-e1.priv.proxad.net"
type="cite">
<pre wrap="">Dear All
I get a Matlab file and I would like to know what is the equivalent to
Matlab:
n = 6;
[u,v]=eigs(K,M,n,'SM'); // where K and U and 2 sparse matrix
//'SM' means Smallest for my understanting -> looking for the 6th lower eigen values, isn't it ?
Scilab:
Spec or bdiag seems to be equivalent, but I failed in using them
How should I to proceed ?
Thanks
Paul
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