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<a name="fmins"></a>
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<p>
Next: <a href="nmsmax.html#nmsmax" accesskey="n" rel="next">nmsmax</a>, Previous: <a href="d2_005fmin.html#d2_005fmin" accesskey="p" rel="prev">d2_min</a>, Up: <a href="Scalar-optimization.html#Scalar-optimization" accesskey="u" rel="up">Scalar optimization</a> &nbsp; [<a href="Function-index.html#Function-index" title="Index" rel="index">Index</a>]</p>
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<hr>
<a name="Alternative-frontend-for-gradient_002dless-algorithms"></a>
<h3 class="section">1.6 Alternative frontend for gradient-less algorithms</h3>
<a name="index-fmins-1"></a>

<a name="XREFfmins"></a><dl>
<dt><a name="index-fmins"></a>Function File: <em>[<var>x</var>] =</em> <strong>fmins</strong> <em>(<var>f</var>,<var>X0</var>,<var>options</var>,<var>grad</var>,<var>P1</var>,<var>P2</var>, ...)</em></dt>
<dd>
<p>Find the minimum of a funtion of several variables.
By default the method used is the Nelder&amp;Mead Simplex algorithm
</p>
<p>Example usage:
  fmins(inline(&rsquo;(x(1)-5).^2+(x(2)-8).^4&rsquo;),[0;0])
</p>
<p><strong>Inputs</strong>
</p><dl compact="compact">
<dt><var>f</var></dt>
<dd><p>A string containing the name of the function to minimize
</p></dd>
<dt><var>X0</var></dt>
<dd><p>A vector of initial parameters fo the function <var>f</var>.
</p></dd>
<dt><var>options</var></dt>
<dd><p>Vector with control parameters (not all parameters are used)
</p><pre class="verbatim">options(1) - Show progress (if 1, default is 0, no progress)
options(2) - Relative size of simplex (default 1e-3)
options(6) - Optimization algorithm
   if options(6)==0 - Nelder &amp; Mead simplex (default)
   if options(6)==1 - Multidirectional search Method
   if options(6)==2 - Alternating Directions search
options(5)
   if options(6)==0 &amp;&amp; options(5)==0 - regular simplex
   if options(6)==0 &amp;&amp; options(5)==1 - right-angled simplex
      Comment: the default is set to &quot;right-angled simplex&quot;.
        this works better for me on a broad range of problems,
        although the default in nmsmax is &quot;regular simplex&quot;
options(10) - Maximum number of function evaluations
</pre></dd>
<dt><var>grad</var></dt>
<dd><p>Unused (For compatibility with Matlab)
</p></dd>
<dt><var>P1</var>, <var>P2</var>, ...</dt>
<dd><p>Optional parameters for function <var>f</var> 
</p>
</dd>
</dl>
</dd></dl>






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