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- <title>Description of lcv</title>
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- <h1>lcv
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- <h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../../../up.png"></a></h2>
- <div class="box"><strong></strong></div>
- <h2><a name="_synopsis"></a>SYNOPSIS <a href="#_top"><img alt="^" border="0" src="../../../up.png"></a></h2>
- <div class="box"><strong>function g=lcv(varargin) </strong></div>
- <h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../../../up.png"></a></h2>
- <div class="fragment"><pre class="comment">
- likelihood cross-validation.
- returned vector consists of log-likelihood, trace(H), trace(H'H)
- and cross-validated deviance (-2 * cross-validated log-likelihood).
- Author: Catherine Loader.</pre></div>
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- <h2><a name="_cross"></a>CROSS-REFERENCE INFORMATION <a href="#_top"><img alt="^" border="0" src="../../../up.png"></a></h2>
- This function calls:
- <ul style="list-style-image:url(../../../matlabicon.gif)">
- <li><a href="locfit.html" class="code" title="function fit=locfit(varargin)">locfit</a> Smoothing noisy data using Local Regression and Likelihood.</li><li><a href="rsum.html" class="code" title="function z = rsum(fit)">rsum</a> </li></ul>
- This function is called by:
- <ul style="list-style-image:url(../../../matlabicon.gif)">
- <li><a href="lcvplot.html" class="code" title="function g=lcvplot(alpha,varargin)">lcvplot</a> </li></ul>
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- <h2><a name="_source"></a>SOURCE CODE <a href="#_top"><img alt="^" border="0" src="../../../up.png"></a></h2>
- <div class="fragment"><pre>0001 <a name="_sub0" href="#_subfunctions" class="code">function g=lcv(varargin)</a>
- 0002 <span class="comment">%</span>
- 0003 <span class="comment">% likelihood cross-validation.</span>
- 0004 <span class="comment">%</span>
- 0005 <span class="comment">% returned vector consists of log-likelihood, trace(H), trace(H'H)</span>
- 0006 <span class="comment">% and cross-validated deviance (-2 * cross-validated log-likelihood).</span>
- 0007 <span class="comment">%</span>
- 0008 <span class="comment">% Author: Catherine Loader.</span>
- 0009
- 0010 fit = <a href="locfit.html" class="code" title="function fit=locfit(varargin)">locfit</a>(varargin{:},<span class="string">'ev'</span>,<span class="string">'cros'</span>);
- 0011 rs = <a href="rsum.html" class="code" title="function z = rsum(fit)">rsum</a>(fit);
- 0012
- 0013 df0 = rs(1);
- 0014 df1 = rs(2);
- 0015 llk = rs(3);
- 0016
- 0017 g = [llk df0 df1 -2*llk];
- 0018
- 0019 <span class="keyword">return</span>;</pre></div>
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