<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?> 
<!DOCTYPE MAN SYSTEM "../../manrev.dtd">
<MAN>
  <LANGUAGE>fr</LANGUAGE>
  <TITLE>trace  </TITLE>
  <TYPE>Scilab Function  </TYPE>
  <DATE>April 1993  </DATE>
  <SHORT_DESCRIPTION name="trace "> trace d&apos;une matrice  </SHORT_DESCRIPTION>
  <CALLING_SEQUENCE>
  <CALLING_SEQUENCE_ITEM>trace(X)  </CALLING_SEQUENCE_ITEM>
  </CALLING_SEQUENCE>
  <PARAM>
 <PARAM_INDENT>
  <PARAM_ITEM>
  <PARAM_NAME>X  </PARAM_NAME>
  <PARAM_DESCRIPTION>
  <SP>
    : matrice carrée, réelle, complexe, polynomiale ou rationnelle.
</SP>
  </PARAM_DESCRIPTION> 
  </PARAM_ITEM>
 </PARAM_INDENT>
  </PARAM>
  <DESCRIPTION>
  <P>
    <VERB>trace(X)</VERB> calcule la trace de <VERB>X</VERB>.
  </P>
  <P>
    Identique à <VERB>sum(diag(X))</VERB>.
  </P>
  </DESCRIPTION>
  <EXAMPLE><![CDATA[
A=rand(3,3);
trace(A)-sum(spec(A))
 ]]></EXAMPLE>
  <SEE_ALSO>
    <SEE_ALSO_ITEM> <LINK>det</LINK> </SEE_ALSO_ITEM>
  </SEE_ALSO>
</MAN>
