BUG - Random seed in _plotting

[andreacortis]

BERTopic/bertopic/plotting/_topics.py

Line 65 in 06dcd47

embeddings = UMAP(n_neighbors=2, n_components=2, metric='hellinger').fit_transform(embeddings)

embeddings = UMAP(n_neighbors=2, n_components=2, metric='hellinger').fit_transform(embeddings)

Right now every time you visualize the intertopic distance you get a new visualization. This is because the UMAP instance does not have a fixed random seed.

[MaartenGr]

Thanks for sharing this. The difficulty here is that it might hurt the performance of UMAP when a random_state is set which is why I initially decided not to use that here. I might change it but I will have to test the quality of the output as well as the wall time for larger datasets.