R: Two-star census for central nodes centered on the first mode...

b1twostar-ergmTerm {ergm} | R Documentation

## 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.

[Package ergm version 4.2.2 Index]