---
title: "Early Prediction on Time Series: A Nearest Neighbor Approach"
authors:
  - "Zhengzheng Xing"
  - "Jian Pei"
  - "Philip S. Yu"
doi: ""
url: "https://ijcai.org/proceedings/2009/218"
pdf: "https://ijcai.org/proceedings/2009/0218.pdf"
venue: "Proceedings of the Twenty-First International Joint Conference on Artificial Intelligence"
year: 2009
pages: "1297-1301"
track: ""
keywords:
---

# Early Prediction on Time Series: A Nearest Neighbor Approach

Zhengzheng Xing, Jian Pei, Philip S. Yu

*Proceedings of the Twenty-First International Joint Conference on Artificial Intelligence*, pages 1297-1301.

## Abstract

In this paper, we formulate the problem of early classification of time series data, which is important in some time-sensitive applications such as health-informatics. We introduce a novel concept of MPL (Minimum Prediction Length) and develop ECTS (Early Classification on Time Series), an effective 1-nearest neighbor classification method. ECTS makes early predictions and at the same time retains the accuracy comparable to that of a 1NN classifier using the full-length time series. Our empirical study using benchmark time series data sets shows that ECTS works well on the real data sets where 1NN classification is effective.Zhengzheng Xing, Jian Pei, Philip S. Yu