absdiffcat-ergmTerm-5b2a4b77: Categorical absolute difference in nodal attribute

In ergm: Fit, Simulate and Diagnose Exponential-Family Models for Networks

Categorical absolute difference in nodal attribute

Description

This term adds one statistic for every possible nonzero distinct value of abs(attr[i]-attr[j]) in the network. The value of each such statistic is the number of edges in the network with the corresponding absolute difference.

Usage

# binary: absdiffcat(attr,
#                 base=NULL,
#                 levels=NULL)

# valued: absdiffcat(attr,
#                 base=NULL,
#                 levels=NULL,
#                 form="sum")

Arguments

attr	a vertex attribute specification (see Specifying Vertex attributes and Levels (?nodal_attributes) for details.)
base	deprecated
levels	specifies which nonzero difference to include in or exclude from the model. (See Specifying Vertex attributes and Levels (?nodal_attributes) for details.)
form	how to aggregate tie values in a valued ERGM: "sum" (the default) for a statistic of the form \sum_{i,j} x_{i,j} y_{i,j}, where y_{i,j} is the value of dyad (i,j) and x_{i,j} is the term's covariate associated with it; and "nonzero" with the edge considered to be present if its value is not 0. See ergmTerm for more information.

Note

ergm versions 3.9.4 and earlier used different arguments for this term. See ergm-options for how to invoke the old behaviour.

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.

See Also

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

\Sexpr[results=rd,stage=render]{ergm:::.formatTermKeywords("ergmTerm", "absdiffcat", "subsection")}

ergm documentation built on Aug. 27, 2025, 9:08 a.m.