attrs is the rows of the mixing matrix and whose RHS
gives that for its columns (which may be different). A one-sided
formula (e.g., ~A ) is symmetrized (e.g., A~A ). A two-sided
formula with a dot on one side calculates the margins of the
mixing matrix, analogously to nodefactor , with A~.
calculating the row/sender/b1 margins and .~A calculating the
column/receiver/b2 margins. If row and column attributes are the
same and the network is undirected, only the cells at or above
the diagonal (where \(\text{row} \le \text{column}\)) will be calculated.
# binary: mm(attrs, levels=NULL, levels2=-1)# valued: mm(attrs, levels=NULL, levels2=-1, form="sum")
a two-sided formula whose LHS gives the attribute or
attribute function (see Specifying Vertex attributes and Levels (?nodal_attributes) for details.) for the rows of the mixing matrix and whose RHS gives
for its columns. A one-sided formula (e.g., ~A) is symmetrized (e.g., A~A)
subset of rows and columns to be used. (See Specifying Vertex
attributes and Levels (?nodal_attributes) for details.)
which specific cells of the matrix to include; ?nodal_attributes for details
character how to aggregate tie values in a valued ERGM
ergmTerm for index of model terms currently visible to the package.
ergm:::.formatTermKeywords("ergmTerm", "mm", "subsection")