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<!DOCTYPE MAN SYSTEM "../../manrev.dtd">
<MAN>
  <LANGUAGE>eng</LANGUAGE>
  <TITLE>artest</TITLE>
  <TYPE>Scilab Function</TYPE>
  <DATE>April 1993</DATE>
  <SHORT_DESCRIPTION name="lotest"> demo of the Lorenz attractor</SHORT_DESCRIPTION>
  <CALLING_SEQUENCE>
    <CALLING_SEQUENCE_ITEM>[]=lotest([f_l,odem,xdim,npts,pinit])  </CALLING_SEQUENCE_ITEM>
    <CALLING_SEQUENCE_ITEM>[y]=lorenz(t,x)  </CALLING_SEQUENCE_ITEM>
    <CALLING_SEQUENCE_ITEM>[]=ilo(sig,ro,beta)  </CALLING_SEQUENCE_ITEM>
    <CALLING_SEQUENCE_ITEM>[]=ilof(sig,ro,beta)  </CALLING_SEQUENCE_ITEM>
  </CALLING_SEQUENCE>
  <PARAM>
    <PARAM_INDENT>
      <PARAM_ITEM>
        <PARAM_NAME>f_l</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>: can be <VERB>&quot;loren&quot;</VERB> or <VERB>lorenz</VERB>. it
  is the name of the external for  the Lorenz
  system. <VERB>&quot;loren&quot;</VERB> will use a Fortran coded
  version of the lorenz system and arnold will and <VERB>loren</VERB>
  will use a Scilab coded version.<VERB>lorentz</VERB> is the Scilab
  macro which code the lorenz system.  This macro is loaded when
  calling <VERB>lotest</VERB>.</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
      <PARAM_ITEM>
        <PARAM_NAME>ilof, ilo</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>:are used to fix the parameters of the Fortran and Scilab code version of the  Lorenz system.</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
      <PARAM_ITEM>
        <PARAM_NAME>odem,xdim,npts</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>: are optional arguments. Their meaning and syntax can be found in the portr3d   help</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
    </PARAM_INDENT>
  </PARAM>
  <DESCRIPTION>
    <P>
    A call to the function <VERB>lotest()</VERB> will interactively 
    display a phase portrait of  a the following dynamical system</P>
    <VERBATIM>
<![CDATA[
 y(1)=sig*(x(2)-x(1));
 y(2)=ro*x(1) -x(2)-x(1)*x(3);
 y(3)=-beta*x(3)+x(1)*x(2);
   ]]>
    </VERBATIM>
  </DESCRIPTION>
  <SEE_ALSO>
    <SEE_ALSO_ITEM>
      <LINK>portr3d</LINK>
    </SEE_ALSO_ITEM>
    <SEE_ALSO_ITEM>
      <LINK>ode</LINK>
    </SEE_ALSO_ITEM>
    <SEE_ALSO_ITEM>
      <LINK>chaintest</LINK>
    </SEE_ALSO_ITEM>
    <SEE_ALSO_ITEM>
      <LINK>lotest</LINK>
    </SEE_ALSO_ITEM>
  </SEE_ALSO>
</MAN>
