Uni-Polar Sigmoid

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#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:

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

Planted: by ;

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