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Questions - unsupervised-learning

Looking for Local Outlier Factor k-neighborhood explanation

I'm currently trying to understand the Local Outlier Factor algorithm and stumbled upon this article: https://towardsdatascience.com/local-outlier-factor-lof-algorithm-for-outlier-identification-8efb8...
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Lisa

algorithm

matplotlib

outliers

unsupervised-learning

anomaly-detection

Votes: 0

Answers: 1

Latest Answer

As pointed out by @myrtlecat I've used a wrong Radius because I thought the radius of the circle must be 2. Basically I've confused K with the K-Distance. Since the K-Distance of D is 3, we get the fo...
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Lisa

TF-IDF/Cosine Similarity - Similarity Histogram

I created a histogram with the similarity scores of all documents in a corpus. The scores were computed with TF-IDF/Cosine Similarity. See included image. I'm not 100% sure how to read the chart. Does...
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ajster

machine-learning

unsupervised-learning

Votes: 0

Answers: 1

Latest Answer

Looking at the histogram, It would seem that the document similarity is not that concentrated (Cosine simlarity is bounded [0,1], and your histogram range is ~0.2-1). Whether this is good or bad depen...
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emilliman5

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