bn.strength.bn.strength is a data frame with the
following columns (one row for each arc):
from, to: the nodes incident on the arc.strength: the strength of the arc. Seearc.strength,boot.strength,custom.strengthandstrength.plotfor details.and some additional attributes:
mode: a character string, the criterion used to
compute the strength coefficient. It can be equal totest,scoreorbootstrap.threshold: a numeric value, the threshold used
to determine if a strength coefficient is significant. An optional column called direction may also be present, giving the
probability of the direction of an arc given its presence in the graph.
Only the plot method is defined for this class; therefore, it can
be manipulated as a standard data frame.