nodeicovar-ergmTerm {ergm} | R Documentation |
Covariance of in-dyad values incident on each actor
Description
This term adds one statistic equal to
\sum_{i,j,k} y_{j,i}y_{k,i}/(n-2)
. This can be
viewed as a valued analog of the istar(2)
statistic.
Usage
# valued: nodeicovar(center, transform)
Arguments
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
Note that this term replaces nodeisqrtcovar
, which has been
deprecated in favor of nodeicovar(transform="sqrt")
.
See Also
ergmTerm
for index of model terms currently visible to the package.
Keywords
directed, valued
[Package
ergm version 4.7.5
Index]