I have a question regarding the implementing partial constraints during
blockmodel minimization. By partial constraints I mean that I have a
group of vertices V1 that are pre-labeled into k clusters i.e. vertices
from V1 that are in different clusters should not mix. Then there is a
second set of vertices V2 that should be able to mix freely with
vertices from both V1 and V2.
I have tried defining a corresponding vertex property and passing it to
clabel argument but have always ended up with partitions in which V1 and
V2 don't mix in the final state.