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<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<!DOCTYPE MAN SYSTEM "../../manrev.dtd">
<MAN>
<LANGUAGE>fr</LANGUAGE>
<TITLE>inv_coeff </TITLE>
<TYPE>Scilab Function </TYPE>
<DATE>April 1993 </DATE>
<SHORT_DESCRIPTION name="inv_coeff"> construction d'une matrice polynomiale partir des coefficients </SHORT_DESCRIPTION>
<CALLING_SEQUENCE>
<CALLING_SEQUENCE_ITEM>[P]=inv_coeff(C,[,d,[name]) </CALLING_SEQUENCE_ITEM>
</CALLING_SEQUENCE>
<PARAM>
<PARAM_INDENT>
<PARAM_ITEM>
<PARAM_NAME>C </PARAM_NAME>
<PARAM_DESCRIPTION>
<SP>
: "grosse" matrice des coefficients
</SP>
</PARAM_DESCRIPTION>
</PARAM_ITEM>
<PARAM_ITEM>
<PARAM_NAME>d </PARAM_NAME>
<PARAM_DESCRIPTION>
<SP>
: degr de la matrice polynomiale (paramtre optionnel valant par dfaut <VERB>d=-1+size(C,'c')/size(C,'r')</VERB>)
</SP>
</PARAM_DESCRIPTION>
</PARAM_ITEM>
<PARAM_ITEM>
<PARAM_NAME>name </PARAM_NAME>
<PARAM_DESCRIPTION>
<SP>
: chane de caractres (indtermine du polynme, <VERB>'x'</VERB> par dfaut).
</SP>
</PARAM_DESCRIPTION>
</PARAM_ITEM>
</PARAM_INDENT>
</PARAM>
<DESCRIPTION>
<P>
<VERB>P=inv_coeff(Mp,k)</VERB>, quand <VERB>k</VERB> est compatible avec la taille de <VERB>Mp</VERB> renvoie une matrice polynomiale de degr k. <VERB>C=[C0,C1,...,Ck]</VERB> et
<VERB>P= C0 + C1*x +... +Ck*x^k</VERB>.
</P>
</DESCRIPTION>
<EXAMPLE><![CDATA[
A=int(10*rand(2,6))
// construction d'une matrice polynomiale de degr 1
P=inv_coeff(A,1)
norm(coeff(P)-A)
// utilisation de la valeur par dfaut du degr
P1=inv_coeff(A)
norm(coeff(P1)-A)
]]></EXAMPLE>
<SEE_ALSO>
<SEE_ALSO_ITEM> <LINK>poly</LINK> </SEE_ALSO_ITEM> <SEE_ALSO_ITEM> <LINK>degree</LINK> </SEE_ALSO_ITEM> <SEE_ALSO_ITEM> <LINK>coeff</LINK> </SEE_ALSO_ITEM>
</SEE_ALSO>
</MAN>
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