# Uni-Polar Sigmoid

A uni-Polar sigmoid function is

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

## Visualization

## Tricks

A very useful trick:

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

Planted:
by L Ma;

Dynamic Backlinks to

`cards/machine-learning/neural-networks/activation-uni-polar-sigmoid`

:`cards/machine-learning/neural-networks/activation-uni-polar-sigmoid`

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