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Hi everybody<br>
<br>
I have a 20k x 20k inferior triangular matrix, that I use in a
QPsolve<br>
<br>
V = -2* TIS(n,n) + (n-1) * eye(n;n)<br>
<br>
This is V= [ (n-1) 0.....................0<br>
2 (n-1) 0..............0<br>
2 2 (n-1) 0......0<br>
....<br>
]<br>
-Is there any way to get a TI matrix from scilab, without using
loops?<br>
<br>
I would like to use V as a "cost function" for qpsolve (minimize
X'.V.X)<br>
-Is qpsolve smart enough to change the basis, or should i do it
myself?<br>
<br>
-Should I use sparse matrices? Can I make a sparse trinagular matrix
quickly?<br>
<br>
Some student have implemented faster code for sparse matrices in
2004 (<a class="moz-txt-link-freetext" href="http://www.iecn.u-nancy.fr/~pincon/scilab/expose_taiwan.pdf">http://www.iecn.u-nancy.fr/~pincon/scilab/expose_taiwan.pdf</a>).
<br>
-Is this implemented in Scilab?<br>
<br>
<br>
<div class="moz-signature">-- <br>
<p style="color:teal; font-size:12pt;"><b>Adrien Vogt-Schilb</b><br>
Research Fellow<br>
<a class="moz-txt-link-abbreviated" href="mailto:vogt@centre-cired.fr">vogt@centre-cired.fr</a><br>
Tel: (+33) 1 43 94 73 96<br>
Fax: (+33) 1 43 94 73 70<br>
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