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tansig.m
executable file
·25 lines (25 loc) · 1.74 KB
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tansig.m
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% ============================================================================%
% PHAX- initialize weights and do backprop %
% %
% Arash Fayyazi and Mohammad Ansari %
% Low-Power High-Performance Nanosystems Laboratory, Tehran %
% SPORT Lab, University of Southern California, Los Angeles, CA 90089 %
% http://nanolab.ut.ac.ir/ %
% http://sportlab.usc.edu/ %
% %
% These models may be freely copied and used for research purposes under %
% the BSD 3-Clause License. %
% %
% %
% Please cite following paper: %
% M. Ansari et al., "PHAX: Physical Characteristics AwareEx-SituTraining %
% Framework for Inverter-Based Memristive Neuromorphic Circuits," in IEEE %
% Transactions on Computer-Aided Design of Integrated Circuits and Systems, %
% vol. 37, no. 8, pp. 1602-1613, Aug. 2018. doi: 10.1109/TCAD.2017.2764070 %
% %
% %
% ============================================================================%
function a = tansig(n)
a = 2 ./ (1 + exp(-2*n)) - 1;
i = find(~isfinite(a));
a(i) = sign(n(i));