datazhen

Results 2 comments of datazhen

### Reason I had met same error when running ` val (j, q) = GraphOps.setupAlias(nodeAttr.neighbors) ` in GraphOps.initTransitionProb, This is due to the `nodeAttr` object being Null. ### Detail 1....

why the length of walks is |walkLength|+2 instead of |walkLength|+1?