nodefactormeanage-ergmTerm-11ed6b41 function

Average ages of extant half-ties incident on nodes of specified attribute levels

# binary: nodefactor.mean.age(attr, levels=NULL, emptyval=0, log=FALSE)

Arguments

• attr: a vertex attribute specification (see Specifying Vertex attributes and Levels (?nodal_attributes) for details.)
• levels: controls what levels are included. Note that the default levels value for nodefactor.mean.age retains all levels, unlike the default for nodefactor , which omits the first level.
• emptyval: can be used to specify the value returned if the network is empty. A different value may be specified for each level of attr. The length of emptyval should either be 1 (in which case that value is used for every level of attr ) or should be equal to the number of retained levels of attr , in which case the i th value in emptyval is used for the i th retained level of attr. This is, technically, an arbitrary value, but it should not have a substantial effect unless a non-negligible fraction of networks at the parameter configuration of interest is empty.
• log: logical specifying if mean log age should be returned instead of mean age

Details

This term adds one statistic for each level of attr , equaling the average, over all half-ties incident on nodes of that level, of the amount of time elapsed since formation.

See Also

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

ergm:::.formatTermKeywords("ergmTerm", "nodefactor.mean.age","subsection")