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Fixing for small number of topics. #229

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merged 1 commit into from Feb 11, 2023
Merged

Fixing for small number of topics. #229

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4 changes: 2 additions & 2 deletions pyLDAvis/_prepare.py
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Expand Up @@ -163,7 +163,7 @@ def js_TSNE(distributions, **kwargs):
tsne : array, shape (`n_dists`, 2)
"""
dist_matrix = squareform(pdist(distributions, metric=_jensen_shannon))
model = TSNE(n_components=2, random_state=0, metric='precomputed', **kwargs)
model = TSNE(n_components=2, random_state=0, metric='precomputed', perplexity=min(len(dist_matrix)-1, 30), **kwargs)
return model.fit_transform(dist_matrix)


Expand Down Expand Up @@ -468,4 +468,4 @@ def to_dict(self):
'topic.order': self.topic_order}

def to_json(self):
return json.dumps(self.to_dict(), cls=NumPyEncoder)
return json.dumps(self.to_dict(), cls=NumPyEncoder)