Software Open Access

Information-Based Similarity

Published: Oct. 26, 2004. Version: 1.0.0


When using this resource, please cite the original publication:

Yang AC, Hseu SS, Yien HW, Goldberger AL, Peng CK: Linguistic analysis of the human heartbeat using frequency and rank order statistics. Phys Rev Lett 2003, 90: 108103.

Please include the standard citation for PhysioNet:

Goldberger AL, Amaral LAN, Glass L, Hausdorff JM, Ivanov PCh, Mark RG, Mietus JE, Moody GB, Peng C-K, Stanley HE. PhysioBank, PhysioToolkit, and PhysioNet: Components of a New Research Resource for Complex Physiologic Signals (2003). Circulation. 101(23):e215-e220.

Software Description

IBS is a novel method for comparing time series based on linguistic analysis of "word" frequency and rank order statistics. It has been applied successfully in a variety of applications, including analysis of interbeat (RR) intervals, classification of the SARS coronavirus, and study of literary works of disputed authorship.

A tutorial introduction to the IBS method is available here, and IBS software may be downloaded from the src directory.

Albert CC Yang has provided an introduction to IBS for general audiences, focusing on analysis of written text, together with an alternative implementation of IBS aimed at textual analysis.


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