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AppendLayer[]

represents a net layer that takes an input array and appends another array to it.

Details and Options
Details and Options Details and Options
Examples  
Basic Examples  
Scope  
See Also
Tech Notes
Related Guides
History
Cite this Page

AppendLayer

AppendLayer[]

represents a net layer that takes an input array and appends another array to it.

Details and Options

  • AppendLayer exposes the following input ports for use in NetGraph etc.:
  • "Input"an array of rank n
    "Element"an array of rank n-1
  • AppendLayer exposes the output port "Output", which is an array of rank n.
  • AppendLayer is typically used inside NetGraph.
  • AppendLayer["port"->shape] allows the shape of the input or element port to be specified. Possible forms for shape are:
  • "Real"a single real number
    "Integer"a single integer
    na vector of length n
    {n1,n2,…}an array of dimensions n1×n2×…
    {"Varying",n2,n3,…}an array whose first dimension is variable and remaining dimensions are n2×n3×…
  • AppendLayer[…][<|"Input"in,"Element"elem|>] explicitly computes the output from applying the layer, which is effectively given by Append[in,elem].
  • AppendLayer[…][<|"Input"{in1,in2,…},"Element"{element1,element2,…}|>] explicitly computes outputs for each of the ini and elementi.
  • When given a NumericArray as input, the output will be a NumericArray.
  • Options[AppendLayer] gives the list of default options to construct the layer. Options[AppendLayer[…]] gives the list of default options to evaluate the layer on some data.
  • Information[AppendLayer[…]] gives a report about the layer.
  • Information[AppendLayer[…],prop] gives the value of the property prop of AppendLayer[…]. Possible properties are the same as for NetGraph.

Examples

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Basic Examples  (2)

Create an AppendLayer:

Create an AppendLayer that takes a vector as input and appends a scalar:

Apply this layer to inputs:

Scope  (1)

Create an AppendLayer that takes a sequence of vectors represented by a matrix as input and appends another vector to it:

Apply this layer to inputs:

Wolfram Research (2018), AppendLayer, Wolfram Language function, https://reference.wolfram.com/language/ref/AppendLayer.html.

Text

Wolfram Research (2018), AppendLayer, Wolfram Language function, https://reference.wolfram.com/language/ref/AppendLayer.html.

CMS

Wolfram Language. 2018. "AppendLayer." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/AppendLayer.html.

APA

Wolfram Language. (2018). AppendLayer. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/AppendLayer.html

BibTeX

@misc{reference.wolfram_2025_appendlayer, author="Wolfram Research", title="{AppendLayer}", year="2018", howpublished="\url{https://reference.wolfram.com/language/ref/AppendLayer.html}", note=[Accessed: 16-August-2025]}

BibLaTeX

@online{reference.wolfram_2025_appendlayer, organization={Wolfram Research}, title={AppendLayer}, year={2018}, url={https://reference.wolfram.com/language/ref/AppendLayer.html}, note=[Accessed: 16-August-2025]}