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IRanges | Software for computing and annotating genomic ranges

A package that provides efficient low-level and highly reusable S4 classes for storing ranges of integers, RLE vectors (Run-Length Encoding) and, more generally, data that can be organized sequentially (formally defined as Vector objects), as well as views on these Vector objects. IRanges provides also efficient list-like classes for storing big collections of instances of the basic classes. All classes in the package use consistent naming and share the same rich and consistent "Vector API" as much as possible.

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IRanges classification

IRanges specifications

Unique identifier:
Command line interface
Operating system:
Unix/Linux, Mac OS, Windows
Artistic License version 2.0
methods, utils, stats, BiocGenerics
Software type:
Restrictions to use:
Programming languages:
Computer skills:

IRanges distribution


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IRanges support



  • Bioconductor Package Maintainer <>


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Bioinformatics and Computational Biology, Genentech, Inc., South San Francisco, CA, USA; European Molecular Biology Laboratory Genome Biology Unit, Heidelberg, Germany; The European Bioinformatics Institute, Cambridge, UK; Computational Biology, Fred Hutchinson Cancer Research Center, Seattle, WA, USA; Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA

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