# SoftMax¶

Versioned name : SoftMax-1

Category : Activation function

Short description : Reference

Detailed description : Reference

Attributes

• axis

• Description : axis represents the axis of which the SoftMax is calculated. axis equal 1 is a default value.

• Range of values : positive integer value

• Type : int

• Default value : 1

• Required : no

Mathematical Formulation

$y_{c} = \frac{e^{Z_{c}}}{\sum_{d=1}^{C}e^{Z_{d}}}$

where $$C$$ is a size of tensor along axis dimension.

Inputs :

• 1 : Input tensor with enough number of dimension to be compatible with axis attribute. Required.

Outputs :

• 1 : The resulting tensor of the same shape and type as input tensor.

Example

<layer ... type="SoftMax" ... >
<data axis="1" />
<input> ... </input>
<output> ... </output>
</layer>