# BiPolar Sigmoid

A BiPolar sigmoid function is

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

## Visualization

Planted:
by L Ma;

Similar Articles:

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