www.pudn.com > starter.zip > sigmoidInv.m, change:2016-03-20,size:465b


function g = sigmoidInv(z) 
%SIGMOID Compute sigmoid functoon 
%   J = SIGMOID(z) computes the sigmoid of z. 
 
% You need to return the following variables correctly  
g = zeros(size(z)); 
 
% ====================== YOUR CODE HERE ====================== 
% Instructions: Compute the sigmoid of each value of z (z can be a matrix, 
%               vector or scalar). 
 
g = 1./(exp(-z)+1); 
 
% ============================================================= 
 
end