Home > SaliencyToolbox > LTUsimulate.m

LTUsimulate

PURPOSE ^

LTUsimulate - simulates an LTU network for numIter time steps.

SYNOPSIS ^

function [output,newStates] = LTUsimulate(LTUnetwork,states,inputs,numIter)

DESCRIPTION ^

 LTUsimulate - simulates an LTU network for numIter time steps.

 [output,newStates] = LTUsimulate(LTUnetwork,states,inputs,numIter)
    simlulates an LTUnetwork with states and input for numIter
    time steps, returns the new states and the output.
       LTUnetwork contains the information for connectivity and for 
          which cells in the network are input and output cells;
       states is a vector containing a state (0 or 1) for each unit;
       input is the numerical input values into the network;
       numIter is the number of iterations to be simulated.

       output is a vector of network outputs (0 or 1);
       newStates is the new state vector for the network.

 See also makeLTUsegmentNetwork, LTUsegmentMap, dataStructures.

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 % LTUsimulate - simulates an LTU network for numIter time steps.
0002 %
0003 % [output,newStates] = LTUsimulate(LTUnetwork,states,inputs,numIter)
0004 %    simlulates an LTUnetwork with states and input for numIter
0005 %    time steps, returns the new states and the output.
0006 %       LTUnetwork contains the information for connectivity and for
0007 %          which cells in the network are input and output cells;
0008 %       states is a vector containing a state (0 or 1) for each unit;
0009 %       input is the numerical input values into the network;
0010 %       numIter is the number of iterations to be simulated.
0011 %
0012 %       output is a vector of network outputs (0 or 1);
0013 %       newStates is the new state vector for the network.
0014 %
0015 % See also makeLTUsegmentNetwork, LTUsegmentMap, dataStructures.
0016 
0017 % This file is part of the SaliencyToolbox - Copyright (C) 2006-2013
0018 % by Dirk B. Walther and the California Institute of Technology.
0019 % See the enclosed LICENSE.TXT document for the license agreement.
0020 % More information about this project is available at:
0021 % http://www.saliencytoolbox.net
0022 
0023 function [output,newStates] = LTUsimulate(LTUnetwork,states,inputs,numIter)
0024 
0025 % do the simulation cycles
0026 for iter = 1:numIter
0027 
0028   % set the states of the input units to the input
0029   states(LTUnetwork.input_idx) = inputs;
0030 
0031   % compute the activity propagation
0032   prop = states * LTUnetwork.connections;
0033   
0034   % apply thresholds
0035   states = double(prop >= LTUnetwork.thresholds);
0036 end
0037 
0038 % assign return values
0039 newStates = states;
0040 output = states(LTUnetwork.output_idx);

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