b1twostar-ergmTerm {ergm}

Two-star census for central nodes centered on the first mode of a bipartite network

Description

This term takes two nodal attributes. Assuming that there are n_1 values of b1attr among the b1 nodes and n_2 values of b2attr among the b2 nodes, then the total number of distinct categories of two stars according to these two attributes is n_1(n_2)(n_2+1)/2. By default, this model term creates a distinct statistic counting each of these categories.

Usage

# binary: b1twostar(b1attr, b2attr, base=NULL, b1levels=NULL, b2levels=NULL, levels2=NULL)

Arguments

b1attr

b1 nodes (actors in some contexts) (see Specifying Vertex attributes and Levels (?nodal_attributes) for details)

b2attr

b2 nodes (events in some contexts). If b2attr is not passed, it is assumed to be the same as b1attr .

b1levels, b2levels, base, levels2

used to leave some of the categories out (see Specifying Vertex attributes and Levels (?nodal_attributes) for details)

Note

The argument base is retained for backwards compatibility and may be removed in a future version. When both base and levels are passed, levels overrides base.

The argument base is retained for backwards compatibility and may be removed in a future version. When both base and levels2 are passed, levels2 overrides base.

See Also

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

Keywords

bipartite, categorical nodal attribute, undirected, binary