is an option for Tree and related functions that specifies a function to use to generate edge styles.


  • ParentEdgeStyleFunction allows specifying the style of the parent edge 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 automatic setting for style
    funca general edge style function
    {pos1func1,pos2func2,}use edge style function funci at position posi
    {patt1func1,patt2func2,}use funci at positions matching patti
  • Edge style specifications are effectively applied in the order ParentEdgeStyle, ParentEdgeStyleFunction and ParentEdgeShapeFunction, with later specifications overriding earlier ones.
  • ParentEdgeStyleFunctionfunc specifies that the style of the parent edge of the root node should be provided by func[data], where data is the data in the root.
  • In ParentEdgeStyleFunction, Allfunc uses func for all subtrees.
  • In ParentEdgeStyleFunction, TreeCases[pattern]func uses func for all subtrees with data matching pattern.


open allclose all

Basic Examples  (4)

Style an individual edge:

Style all edges:

Use the same style function for all edges:

Specify positions using position patterns:

Specify positions using data patterns:

Properties & Relations  (4)

Styles for edges can be specified by position:

Styles specified by a subtree take precedence over styles 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 position {i,j,} that match patt:

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

Wolfram Research (2022), ParentEdgeStyleFunction, Wolfram Language function,


Wolfram Research (2022), ParentEdgeStyleFunction, Wolfram Language function,


Wolfram Language. 2022. "ParentEdgeStyleFunction." Wolfram Language & System Documentation Center. Wolfram Research.


Wolfram Language. (2022). ParentEdgeStyleFunction. Wolfram Language & System Documentation Center. Retrieved from


@misc{reference.wolfram_2024_parentedgestylefunction, author="Wolfram Research", title="{ParentEdgeStyleFunction}", year="2022", howpublished="\url{}", note=[Accessed: 25-July-2024 ]}


@online{reference.wolfram_2024_parentedgestylefunction, organization={Wolfram Research}, title={ParentEdgeStyleFunction}, year={2022}, url={}, note=[Accessed: 25-July-2024 ]}