Uni-Polar Sigmoid

#Artificial Neuron #Neural Network #Basics #Activation Function

A uni-Polar sigmoid function is

$$ \sigma(x) = \frac{1}{1+e^{-x}}. $$

Visualization

Uni-polar Sigmoid function

Tricks

A very useful trick:

$$ 1 - \sigma(x) = \sigma(-x). $$

Published: by ;

L Ma (2018). 'Uni-Polar Sigmoid', Datumorphism, 11 April. Available at: https://datumorphism.leima.is/cards/machine-learning/neural-networks/activation-uni-polar-sigmoid/.

Current Ref:

  • cards/machine-learning/neural-networks/activation-uni-polar-sigmoid.md