Towards Time Series Reasoning with LLMs

• URL: http://arxiv.org/abs/2409.11376v1
• Date: Tue, 17 Sep 2024 17:23:44 GMT
• Title: Towards Time Series Reasoning with LLMs
• Authors: Winnie Chow, Lauren Gardiner, Haraldur T. Hallgrímsson, Maxwell A. Xu, Shirley You Ren,
• Abstract summary: We propose a novel multi-modal time-series LLM approach that learns generalizable information across various domains with powerful zero-shot performance. We show that our model learns a latent representation that reflects specific time-series features, as well as outperforming GPT-4o on a set of zero-shot reasoning tasks.
• Score: 0.4369058206183195
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Multi-modal large language models (MLLMs) have enabled numerous advances in understanding and reasoning in domains like vision, but we have not yet seen this broad success for time-series. Although prior works on time-series MLLMs have shown promising performance in time-series forecasting, very few works show how an LLM could be used for time-series reasoning in natural language. We propose a novel multi-modal time-series LLM approach that learns generalizable information across various domains with powerful zero-shot performance. First, we train a lightweight time-series encoder on top of an LLM to directly extract time-series information. Then, we fine-tune our model with chain-of-thought augmented time-series tasks to encourage the model to generate reasoning paths. We show that our model learns a latent representation that reflects specific time-series features (e.g. slope, frequency), as well as outperforming GPT-4o on a set of zero-shot reasoning tasks on a variety of domains.

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