Sigmoid Function

External

• https://en.wikipedia.org/wiki/Sigmoid_function

Internal

• Mathematical Analysis

Overview

Often, the sigmoid function refers to a special case of the logistic function.

Logistic Function

Used by:

• Neural network activation units with logistic functions

Logistic Function MATLAB Implementation

%
% Compute the logistic function of z, where z can be a scalar, vector or matrix
%
function s = logistic(z)
s = 1 ./ (1 + (e .^ (-1 .* z)));
end