R: Covariance of in-dyad values incident on each actor

nodeicovar-ergmTerm {ergm}

R Documentation

Covariance of in-dyad values incident on each actor

This term adds one statistic equal to ∑_{i,j,k} y_{j,i}y_{k,i}/(n-2) . This can be viewed as a valued analog of the istar(2) statistic.

# valued: nodeicovar(center, transform)

`center`	If `center=TRUE` , the y_{\cdot,\cdot} s are centered by their mean over the whole network before the calculation. Note that this makes the model non-local, but it may alleviate multimodailty.
`transform`	If `transform="sqrt"` , y_{\cdot,\cdot} s are repaced by their square roots before the calculation. This makes sense for counts in particular. If `center=TRUE` as well, they are centered by the mean of the square roots.

Note that this term replaces nodeisqrtcovar , which has been deprecated in favor of nodeicovar(transform="sqrt") .