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  <title>Description of invlink</title>
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  <meta name="description" content="inverse link function for locfit.">
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<h1>invlink
</h1>

<h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../../../up.png"></a></h2>
<div class="box"><strong>inverse link function for locfit.</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 y0 = invlink(y,fali) </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"> inverse link function for locfit.
 y is a vector of raw fitted values.
 fali is the integer [family link] vector from locfit.
 output is the inv. link.</pre></div>

<!-- crossreference -->
<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)">
</ul>
This function is called by:
<ul style="list-style-image:url(../../../matlabicon.gif)">
<li><a href="lfband.html" class="code" title="function lfband(fit,varargin)">lfband</a>	adds confidence bands around the plot of a locfit() fit.</li><li><a href="lfplot.html" class="code" title="function lfplot(varargin)">lfplot</a>	Plot (for one or two dimensions) a locfit() fit.</li><li><a href="smooth_lf.html" class="code" title="function z=smooth_lf(x,y,varargin)">smooth_lf</a>	must (unlike R smooth.lf() function) give x and y.</li><li><a href="../../../chronux_2_10/spectral_analysis/helper/den_jack.html" class="code" title="function [m,ll,ul,llj,ulj]=den_jack(X,family,varargin)">den_jack</a>	Function to compute smooth estimates of the mean of x using locfit,</li></ul>
<!-- crossreference -->


<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 y0 = invlink(y,fali)</a>
0002 <span class="comment">% inverse link function for locfit.</span>
0003 <span class="comment">% y is a vector of raw fitted values.</span>
0004 <span class="comment">% fali is the integer [family link] vector from locfit.</span>
0005 <span class="comment">% output is the inv. link.</span>
0006 
0007 link = fali(2);
0008 
0009 <span class="keyword">switch</span>(link)
0010     <span class="keyword">case</span> 3   <span class="comment">% identity</span>
0011         y0 = y;
0012     <span class="keyword">case</span> 4   <span class="comment">% log</span>
0013         y0 = exp(y);
0014     <span class="keyword">case</span> 5   <span class="comment">% logit - should invert carefully!</span>
0015         y0 = 1 - 1./(1+exp(y));
0016     <span class="keyword">case</span> 6   <span class="comment">% inverse</span>
0017         y0 = 1/y;
0018     <span class="keyword">case</span> 7   <span class="comment">% sqrt</span>
0019         y0 = y*abs(y);
0020     <span class="keyword">case</span> 8   <span class="comment">% arcsin</span>
0021         y0 = sin(y)*sin(y);
0022     <span class="keyword">otherwise</span>
0023         disp(<span class="string">'invlink: Unknown link function'</span>);
0024 <span class="keyword">end</span>;</pre></div>
<hr><address>Generated on Fri 12-Aug-2011 11:36:15 by <strong><a href="http://www.artefact.tk/software/matlab/m2html/" target="_parent">m2html</a></strong> &copy; 2005</address>
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