CLUES-WEASEL: No additional clues required to choose your time series clustering algorithm

• URL: http://arxiv.org/abs/2609.07606v1
• Date: Mon, 07 Sep 2026 15:15:01 GMT
• Title: CLUES-WEASEL: No additional clues required to choose your time series clustering algorithm
• Abstract summary: CLUES-WEASEL stands for CLustering with the UnsupervisEd Second version of Word ExtrAction for time SEries cLassification.<n>We present a novel time series clustering algorithm that we call CLUES-WEASEL, which stands for CLustering with the UnsupervisEd Second version of Word ExtrAction for time SEries cLassification.
• Score: 0.4145742235679815
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Time series data is very common in many real-world applications and in numerous domains, with increasing interest for automated information extraction using machine learning. One of these subfields is time series clustering, which consists in identifying clusters among a set of time series in an unsupervised fashion. Most time series clustering algorithms suffer from the same balancing act: they trade clustering performance for faster runtimes or vice versa. We present a novel time series clustering algorithm that we call CLUES-WEASEL, which stands for CLustering with the UnsupervisEd Second version of Word ExtrAction for time SEries cLassification. CLUES-WEASEL extracts features using the unsupervised version of the transformation step of WEASEL 2.0, which is a time series classification algorithm, then reduces these features using principal component analysis, and finally performs clustering with the $k$-means algorithm using these reduced extracted features. Through extensive experiments, we prove that CLUES-WEASEL is significantly better than any other existing time series clustering algorithm while being (much) faster than any state-of-the-art one. We also show that the architecture of CLUES-WEASEL can work well with other time series feature extraction algorithms. Our findings highlight the relevance of CLUES-WEASEL for time series clustering.

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