evolveleakyintfire.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"><html><head> <title>Description of evolveLeakyIntFire</title> <meta name="keywords" content="evolveLeakyIntFire"> <meta name="description" content="evolveLeakyIntFire - evolves an LIF network by one time step."> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta name="generator" content="m2html © 2003 Guillaume Flandin"> <meta name="robots" content="index, follow"> <link type="text/css" rel="stylesheet" href="../m2html.css"></head><body><a name="_top"></a><div><a href="../index.html">Home</a> > <a href="#">mfiles</a> > evolveLeakyIntFire.m</div><!--<table width="100%"><tr><td align="left"><a href="../index.html"><img alt="<" border="0" src="../left.png"> Master index</a></td><td align="right"><a href="index.html">Index for .\mfiles <img alt=">" border="0" src="../right.png"></a></td></tr></table>--><h1>evolveLeakyIntFire</h1><h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2><div class="box"><strong>evolveLeakyIntFire - evolves an LIF network by one time step.</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 [LIF,spikes] = evolveLeakyIntFire(LIF,t) </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"> evolveLeakyIntFire - evolves an LIF network by one time step. [LIF,spikes] = evolveLeakyIntFire(LIF,t) Computes on integration step of length t for the network of leaky integrate and fire neurons in LIF, return the new LIF neurons, and return a vector of spiking activity (0 or 1) in spikes. See also <a href="defaultLeakyIntFire.html" class="code" title="function LIF = defaultLeakyIntFire">defaultLeakyIntFire</a>, <a href="evolveWTA.html" class="code" title="function [wta,winner] = evolveWTA(wta)">evolveWTA</a>, <a href="dataStructures.html" class="code" title="">dataStructures</a>.</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="evolveWTA.html" class="code" title="function [wta,winner] = evolveWTA(wta)">evolveWTA</a> evolveWTA - evolves the winner-take-all network by one time step.</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 <span class="comment">% evolveLeakyIntFire - evolves an LIF network by one time step.</span>0002 <span class="comment">%</span>0003 <span class="comment">% [LIF,spikes] = evolveLeakyIntFire(LIF,t)</span>0004 <span class="comment">% Computes on integration step of length t for the network</span>0005 <span class="comment">% of leaky integrate and fire neurons in LIF, return the</span>0006 <span class="comment">% new LIF neurons, and return a vector of spiking activity</span>0007 <span class="comment">% (0 or 1) in spikes.</span>0008 <span class="comment">%</span>0009 <span class="comment">% See also defaultLeakyIntFire, evolveWTA, dataStructures.</span>0010 0011 <span class="comment">% This file is part of the SaliencyToolbox - Copyright (C) 2006-2007</span>0012 <span class="comment">% by Dirk B. Walther and the California Institute of Technology.</span>0013 <span class="comment">% See the enclosed LICENSE.TXT document for the license agreement.</span>0014 <span class="comment">% More information about this project is available at:</span>0015 <span class="comment">% http://www.saliencytoolbox.net</span>0016 0017 <a name="_sub0" href="#_subfunctions" class="code">function [LIF,spikes] = evolveLeakyIntFire(LIF,t)</a>0018 0019 dt = t - LIF.time;0020 0021 <span class="comment">% integrate</span>0022 LIF.V = LIF.V + dt./LIF.C * (LIF.I - LIF.Gleak.*(LIF.V - LIF.Eleak) - <span class="keyword">...</span>0023 LIF.Gexc.*(LIF.V - LIF.Eexc) - <span class="keyword">...</span>0024 LIF.Ginh.*(LIF.V - LIF.Einh));0025 0026 <span class="comment">% clamp potentials that are lower than Einh</span>0027 idx = (LIF.V < LIF.Einh);0028 <span class="keyword">if</span> (length(LIF.Einh) > 1)0029 LIF.V(idx) = LIF.Einh(idx);0030 <span class="keyword">else</span>0031 LIF.V(idx) = LIF.Einh;0032 <span class="keyword">end</span>0033 0034 <span class="comment">% let Ginh decay (for IOR to wear off)</span>0035 LIF.Ginh = LIF.Ginh * LIF.GinhDecay;0036 0037 <span class="comment">% fire?</span>0038 spikes = (LIF.V > LIF.Vthresh) & LIF.DoesFire;0039 0040 <span class="comment">% reset units that have just fired</span>0041 LIF.V(spikes) = 0;0042 0043 LIF.time = t;</pre></div><hr><address>Generated on Fri 07-Sep-2007 14:42:18 by <strong><a href="http://www.artefact.tk/software/matlab/m2html/">m2html</a></strong> © 2003</address></body></html>⌨️ 快捷键说明
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