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  • Committer: Bazaar Package Importer
  • Author(s): Torsten Werner
  • Date: 2002-03-21 16:57:43 UTC
  • Revision ID: james.westby@ubuntu.com-20020321165743-e9mv12c1tb1plztg
Tags: upstream-2.6
Import upstream version 2.6

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macros/calpol/pol2des.sci
 
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function [N,B,C]=pol2des(Ds)
 
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// Given the polynomial matrix Ds= D_0 +D_1 s +D_2 s^2 + ... +D_k s^k,
 
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// pol2des returns three  matrices N,B,C  (with N nilpotent) such that
 
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// Ds = C (sN-Eye)^-1 B 
 
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//!
 
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// Copyright INRIA
 
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if type(Ds)==1 then Ds=Ds+0*poly(0,'s')*Ds;end
 
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dg=maxi(degree(Ds))+1;
 
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[nout,nin]=size(Ds);
 
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[Sl]=markp2ss(coeff(Ds),dg,nout,nin);
 
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N=Sl(2);B=-Sl(3);C=Sl(4)