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<!DOCTYPE MAN SYSTEM "../../manrev.dtd">
<MAN>
  <LANGUAGE>eng</LANGUAGE>
  <TITLE>dcf</TITLE>
  <TYPE>Scilab Function</TYPE>
  <DATE>April 1993</DATE>
  <SHORT_DESCRIPTION name="dcf"> double coprime factorization</SHORT_DESCRIPTION>
  <CALLING_SEQUENCE>
    <CALLING_SEQUENCE_ITEM>[N,M,X,Y,NT,MT,XT,YT]=dcf(G,[polf,polc,[tol]])   </CALLING_SEQUENCE_ITEM>
  </CALLING_SEQUENCE>
  <PARAM>
    <PARAM_INDENT>
      <PARAM_ITEM>
        <PARAM_NAME>G</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>: <VERB>syslin</VERB> list (continuous-time linear system)</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
      <PARAM_ITEM>
        <PARAM_NAME>polf, polc</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>: respectively the poles of <VERB>XT</VERB> and <VERB>YT</VERB> and the poles of <VERB>N</VERB>  and <VERB>M</VERB> (default values =<VERB>-1</VERB>).</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
      <PARAM_ITEM>
        <PARAM_NAME>tol</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>: real threshold for detecting stable poles (default value <VERB>100*%eps</VERB>).</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
      <PARAM_ITEM>
        <PARAM_NAME>N,M,XT,YT,NT,MT,X,Y</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>: linear systems represented by <VERB>syslin</VERB> lists</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
    </PARAM_INDENT>
  </PARAM>
  <DESCRIPTION>
    <P>
    returns eight stable systems <VERB>(N,M,X,Y,NT,MT,XT,YT) </VERB>
    for the doubly coprime factorization</P>
    <P><VERB>G</VERB> must be stabilizable and detectable.</P>
  </DESCRIPTION>
  <SEE_ALSO>
    <SEE_ALSO_ITEM>
      <LINK>copfac</LINK>
    </SEE_ALSO_ITEM>
  </SEE_ALSO>
</MAN>
