ttriple-ergmTerm {ergm}

Transitive triples

Description

By default, this term adds one statistic to the model, equal to the number of transitive triples in the network, defined as a set of edges \{(i{\rightarrow}j), j{\rightarrow}k), (i{\rightarrow}k)\} . Note that triangle equals ttriple+ctriple for a directed network, so at most two of the three terms can be in a model.

Usage

# binary: ttriple(attr=NULL, diff=FALSE, levels=NULL)

# binary: ttriad

Arguments

attr

a vertex attribute specification (see Specifying Vertex attributes and Levels (?nodal_attributes) for details.)

diff

If attr is specified and diff is FALSE , then the count is over the number of transitive triples where all three nodes have the same value of the attribute. If attr is specified and diff is TRUE , then one statistic is added for each value of attr , equal to the number of triangles where all three nodes have that value of the attribute.

levels

add one statistic for each value specified if diff is TRUE. (See Specifying Vertex attributes and Levels (?nodal_attributes) for details.)

Note

This term can only be used with directed networks.

See Also

ergmTerm for index of model terms currently visible to the package.

Keywords

categorical nodal attribute, directed, triad-related, binary