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TreeElementLabelFunction

is an option for Tree and related functions that specifies functions to use to generate subtree element labels.

Details
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Examples  
Basic Examples  
Scope  
Properties & Relations  
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TreeElementLabelFunction

TreeElementLabelFunction

is an option for Tree and related functions that specifies functions to use to generate subtree element labels.

Details

  • TreeElementLabelFunction allows specifying the function to generate the label of the root node of a tree, as well as that of any subtrees at positions matching a pattern.
  • The following option settings can be used:
  • Automaticuse the node data as the labels
    Noneuse no label
    funca general node label function »
    Allfuncuse label function func for all nodes »
    TreeCases[pattern]funcuse func for nodes with data matching pattern »
    "Leaves"funcuse func for leaves »
    "NonLeaves"funcuse func for non-leaves »
    {pos1func1,pos2func2,…}use funci for the node at relative position posi »
    {patt1func1,patt2func2,…}use funci for nodes at positions matching patti »
  • Subtree element label specifications are effectively applied in the order TreeElementLabel, TreeElementLabelFunction and TreeElementLabelStyle, with later specifications overriding earlier ones.
  • TreeElementLabelFunctionfunc specifies that the label of the root node should be provided by func[data], where data is the data in the root.

Examples

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Basic Examples  (4)

Label an individual node:

Specify a list of node label functions:

Use no node labels:

Specify label functions for the leaves and for the non-leaves:

Scope  (2)

Specify positions using position patterns:

Specify positions using data patterns:

Properties & Relations  (5)

Nodes are automatically labeled with their data:

Labels for nodes can be specified by position:

Labels specified by a subtree take precedence over labels specified by its ancestors:

A position {i,j,…} in a subtree refers to its subtree at relative position {i,j,…}:

A relative position {2} at position {1} refers to the global position {1,2}:

In general, a pattern patt applies to subtrees at global positions {i,j,…} that match patt:

A list of patterns {patt1,patt2,…} applies to relative positions {i,j,…} that match the patti:

Wolfram Research (2022), TreeElementLabelFunction, Wolfram Language function, https://reference.wolfram.com/language/ref/TreeElementLabelFunction.html.

Text

Wolfram Research (2022), TreeElementLabelFunction, Wolfram Language function, https://reference.wolfram.com/language/ref/TreeElementLabelFunction.html.

CMS

Wolfram Language. 2022. "TreeElementLabelFunction." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/TreeElementLabelFunction.html.

APA

Wolfram Language. (2022). TreeElementLabelFunction. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/TreeElementLabelFunction.html

BibTeX

@misc{reference.wolfram_2025_treeelementlabelfunction, author="Wolfram Research", title="{TreeElementLabelFunction}", year="2022", howpublished="\url{https://reference.wolfram.com/language/ref/TreeElementLabelFunction.html}", note=[Accessed: 15-August-2025]}

BibLaTeX

@online{reference.wolfram_2025_treeelementlabelfunction, organization={Wolfram Research}, title={TreeElementLabelFunction}, year={2022}, url={https://reference.wolfram.com/language/ref/TreeElementLabelFunction.html}, note=[Accessed: 15-August-2025]}