NetArray

NetArray[]

represents an array in a net.

NetArray["name"]

uses "name" as an identifier to share the array in more than one layer.

NetArray[propvalue]

specifies the property prop for the array.

NetArray["Name"name,"Array"array,…]

specifies several properties for the array.

Details

  • NetArray is typically used to share arrays in NetChain/NetGraph or to define learnable parameters in FunctionLayer[…].
  • All net arrays sharing the same name in a net are treated as the same underlying array by NetInitialize, NetTrain, etc.
  • The properties that can be specified are:
  • "Array"initial values or inialization method for the array
    "Dimensions"dimensions of the array
    "Name"name of the array, so that it can be shared
  • NetArray[] automatically gives a name (UUID) to the array and is equivalent to NetArray[Automatic].
  • NetInsertSharedArrays[layer] will return a new layer in which all its arrays have been replaced with named net arrays.

Examples

Basic Examples  (3)

Create a layer containing a shared array:

Create a chain that contains a shared array, used in two layers:

Initialize all arrays:

The weights from the two linear layers are the same (and will remain the same when training with NetTrain):

Extract all the shared arrays of a net:

Define a FunctionLayer that adds a list of learnable values to a list, initialized with arbitrary values:

Evaluate the layer on an input list:

The original NetArray corresponds to a NetArrayLayer in the equivalent NetGraph:

Wolfram Research (2020), NetArray, Wolfram Language function, https://reference.wolfram.com/language/ref/NetArray.html.

Text

Wolfram Research (2020), NetArray, Wolfram Language function, https://reference.wolfram.com/language/ref/NetArray.html.

CMS

Wolfram Language. 2020. "NetArray." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/NetArray.html.

APA

Wolfram Language. (2020). NetArray. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/NetArray.html

BibTeX

@misc{reference.wolfram_2024_netarray, author="Wolfram Research", title="{NetArray}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/NetArray.html}", note=[Accessed: 22-December-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_netarray, organization={Wolfram Research}, title={NetArray}, year={2020}, url={https://reference.wolfram.com/language/ref/NetArray.html}, note=[Accessed: 22-December-2024 ]}