# Tanh

Tanh  // Elementwise hyperbolic tangent operation.


## Description¶

Produce a tensor with the same shape and element typye as arg, where the value at each coordinate of output is the hyperbolic tangent of the value of arg at the same coordinate.

### Inputs¶

Name

Element Type

Shape

arg

Any

Any

### Outputs¶

Name

Element Type

Shape

output

Same as arg

Same as arg

## Mathematical Definition¶

$\mathtt{output}_{i_0, \ldots, i_{n-1}} = \tanh(\mathtt{arg}_{i_0, \ldots, i_{n-1}})$

## Backprop¶

$\overline{\mathtt{arg}} \leftarrow \Delta\ (1 - \mathtt{output}^2)$

## C++ Interface¶

class Tanh : public ngraph::op::util::UnaryElementwiseArithmetic

Elementwise hyperbolic tangent operation.

Public Functions

const std::string &description() const

Get the string name for the type of the node, such as Add or Multiply. The class name, must not contain spaces as it is used for codegen.

Return

A const reference to the node’s type name

Tanh(const std::shared_ptr<Node> &arg)

Constructs a hyperbolic tangent operation.

Parameters
• arg: Node that produces the input tensor.