Hard \(\mathrm{tanh}\) activation function.
Computes the element-wise function:
\[\begin{split}\mathrm{hard\_tanh}(x) = \begin{cases}
-1, & x < -1\\
x, & -1 \le x \le 1\\
1, & 1 < x
\end{cases}\end{split}\]
- Parameters:
x (Any) – input array
- Return type:
Any
