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NetAppend[net,layer]

appends a layer or a net onto a NetChain, a layer or a NetGraph with one output port.

NetAppend[net,"name"layer]

appends a layer with a given name.

NetAppend[net,{layer1,layer2,…}]

appends several layers or nets.

Details and Options
Details and Options Details and Options
Examples  
Basic Examples  
Scope  
Options  
"Input"  
"Output"  
Possible Issues  
See Also
Tech Notes
Related Guides
History
Cite this Page

NetAppend

NetAppend[net,layer]

appends a layer or a net onto a NetChain, a layer or a NetGraph with one output port.

NetAppend[net,"name"layer]

appends a layer with a given name.

NetAppend[net,{layer1,layer2,…}]

appends several layers or nets.

Details and Options

  • The input of the appended layer must be compatible with the output of the final layer in the chain.
  • Any NetDecoder previously attached to the end of net will be removed.
  • NetAppend takes the following options:
  • "Input"Automatictype for the input of the resulting chain
    "Output"Automatictype for the output of the resulting chain
  • Options "Input" and "Output" support the normal type specifications allowed by NetChain, including NetEncoder and NetDecoder.

Examples

open all close all

Basic Examples  (3)

Append a layer to the end of a chain:

Append a named layer to the end of a chain:

Append several layers to the end of a chain:

Scope  (3)

Append a layer and attach a NetDecoder:

Create a NetChain with NetAppend:

Append a layer to a NetGraph with one output:

Append a named layer:

Options  (6)

"Input"  (3)

Set the input shape of the net:

Set a NetEncoder for the net:

Using this option is equivalent to using NetReplacePart on the returned net:

"Output"  (3)

Set a NetDecoder for the net:

Using this option is equivalent to using NetReplacePart on the returned net:

An existing NetDecoder can be added back to the returned net using this option, provided it is compatible with the new final layer:

Possible Issues  (3)

The input of the appended layer must be compatible with the output of the final layer in the chain:

A layer with several input ports cannot be appended:

A layer cannot be appended to a network with more than one output:

Wolfram Research (2018), NetAppend, Wolfram Language function, https://reference.wolfram.com/language/ref/NetAppend.html (updated 2021).

Text

Wolfram Research (2018), NetAppend, Wolfram Language function, https://reference.wolfram.com/language/ref/NetAppend.html (updated 2021).

CMS

Wolfram Language. 2018. "NetAppend." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2021. https://reference.wolfram.com/language/ref/NetAppend.html.

APA

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

BibTeX

@misc{reference.wolfram_2025_netappend, author="Wolfram Research", title="{NetAppend}", year="2021", howpublished="\url{https://reference.wolfram.com/language/ref/NetAppend.html}", note=[Accessed: 15-August-2025]}

BibLaTeX

@online{reference.wolfram_2025_netappend, organization={Wolfram Research}, title={NetAppend}, year={2021}, url={https://reference.wolfram.com/language/ref/NetAppend.html}, note=[Accessed: 15-August-2025]}