# Tanh¶

Versioned name : Tanh-1

Category : Arithmetic unary

Short description : Tanh performs element-wise hyperbolic tangent (tanh) operation with given tensor.

Detailed description

For each element from the input tensor calculates corresponding element in the output tensor with the following formula:

$tanh ( x ) = \frac{2}{1+e^{-2x}} - 1 = 2sigmoid(2x) - 1$
• For integer element type the result is rounded (half up) to the nearest integer value.

Attributes : Tanh operation has no attributes.

Inputs :

• 1 : A tensor of type T and arbitrary shape. Required.

Outputs :

• 1 : The result of element-wise Tanh operation. A tensor of type T and the same shape as input tensor. Types

• T : any numeric type.

Examples

Example 1

<layer ... type="Tanh">
<input>
<port id="0">
<dim>256</dim>
<dim>56</dim>
</port>
</input>
<output>
<port id="1">
<dim>256</dim>
<dim>56</dim>
</port>
</output>
</layer>