Information-based Similarity Toolbox

Information-based similarity index is an analysis of measuring distance between symbolic sequences
Updated 22 May 2014

View License

The Information-based Similarity (IBS) method was developed to effectively categorize symbolic sequences according to their information content. The method has been fully described and validated (4), with applications to heart rate time series (1), literary authorship disputes (2), and genetic sequences (3).

This toolbox provides an array of MATLAB functions for quantifying the distance (or dis-similarity) between a set of symbolic sequences, and for displaying the results in graphical form such as dendrogram. The type of symbolic sequences can be binary sequences mapping from a time series, written texts of any given language, or genetic sequences.


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

2. Yang AC, Peng CK, Yien HW, Goldberger AL. Information categorization approach to literary authorship disputes. Physica A, 329, 473 (2003).

3. Yang AC, Goldberger AL, Peng CK. Genomic classification using an information-based similarity index : application to the SARS coronavirus. J Comput Biol. 12(8):1103-16 (2005).

4. Peng CK, Yang AC, Goldberger AL. Statistical physics approach to categorize biologic signals: from heart rate dynamics to DNA sequences. Chaos 17: 015115 (2007).

Cite As

Albert Yang (2024). Information-based Similarity Toolbox (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2011a
Compatible with any release
Platform Compatibility
Windows macOS Linux
Find more on Genomics and Next Generation Sequencing in Help Center and MATLAB Answers

Inspired by: Chaotic Systems Toolbox, IsUnicode, Read Unicode Files

Inspired: Read Unicode Files

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!
Version Published Release Notes

Update general information

Update manual