How to obtain Node2Vec vectors all of the nodes?

Question

I have tried nodevectors , fastnode2vec. But I cannot get vectors of all nodes. Why? e.g.

The code is

from fastnode2vec import Node2Vec

graph = Graph(_lst, directed=True, weighted=True)

model = Node2Vec(_graph, dim=300, walk_length=100, context=10, p=2.0, q=0.5, workers=-1)

model.train(epochs=epochs)

I have 10,000 nodes. When I check:

model.index_to_key

there are only 502 nodes. Why is that? How to set parameters so I can get the vectors of all nodes?

Answer 1

It's possible that your settings are not generating enough appearances of all nodes to meet other requirements for inclusion, such as the min_count=5 used by the related Word2Vec superclass to discard tokens with too few example usages to model well.

See this other related answer for related considerations & possible fixes (though in the context of the nodevectors package rather than the fastnode2vec package you're using):

nodevectors not returning all nodes

If that doesn't help resolve your issue, you should include more details about your graph - such as demonstrating via displayed output that it really has 10,000 nodes, & they're all sufficiently conneted, & that the random-walks generated by your node2vec library sufficiently revisit all of them for the training purposes.