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# softmaxLayer

Softmax layer

## Description

A softmax layer applies a softmax function to the input.

## Creation

### Description

layer = softmaxLayer creates a softmax layer.

example

layer = softmaxLayer('Name',Name) creates a softmax layer and sets the optional Name property using a name-value pair. For example, softmaxLayer('Name','sm1') creates a softmax layer with the name 'sm1'. Enclose the property name in single quotes.

## Properties

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Layer name, specified as a character vector or a string scalar. To include a layer in a layer graph, you must specify a nonempty, unique layer name. If you train a series network with the layer and Name is set to '', then the software automatically assigns a name to the layer at training time.

Data Types: char | string

Number of inputs of the layer. This layer accepts a single input only.

Data Types: double

Input names of the layer. This layer accepts a single input only.

Data Types: cell

Number of outputs of the layer. This layer has a single output only.

Data Types: double

Output names of the layer. This layer has a single output only.

Data Types: cell

## Examples

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Create a softmax layer with the name 'sm1'.

layer = softmaxLayer('Name','sm1')
layer =
SoftmaxLayer with properties:

Name: 'sm1'

Include a softmax layer in a Layer array.

layers = [ ...
imageInputLayer([28 28 1])
convolution2dLayer(5,20)
reluLayer
maxPooling2dLayer(2,'Stride',2)
fullyConnectedLayer(10)
softmaxLayer
classificationLayer]
layers =
7x1 Layer array with layers:

1   ''   Image Input             28x28x1 images with 'zerocenter' normalization
2   ''   Convolution             20 5x5 convolutions with stride [1  1] and padding [0  0  0  0]
3   ''   ReLU                    ReLU
4   ''   Max Pooling             2x2 max pooling with stride [2  2] and padding [0  0  0  0]
5   ''   Fully Connected         10 fully connected layer
6   ''   Softmax                 softmax
7   ''   Classification Output   crossentropyex

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## References

[1] Bishop, C. M. Pattern Recognition and Machine Learning. Springer, New York, NY, 2006.

## Extended Capabilities

### GPU Code GenerationGenerate CUDA® code for NVIDIA® GPUs using GPU Coder™.

Introduced in R2016a

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