Network Graph Toolkit

a collection of tools and applications for network analysis


The NGraph Toolkit consists of over thirty programs, filters, and scripts for the analysis of large networks represented as mathematical graphs. These are stand-alone programs written in C++, C shell, and Bash scripts. The core algorithms are provided by the NGraph C++ library, which is used to build some of the following applications:

File extensions

Community Info:

Graph formats

Graph File extensions

For example: *.gu1 represents an undirected graph, with 1-based contiguous vertices. *) graph file tools:

This software was developed at the National Institute of Standards and Technology (NIST) by employees of the Federal Government in the course of their official duties. Pursuant to title 17 Section 105 of the United States Code this software is not subject to copyright protection and is in the public domain. NIST assumes no responsibility whatsoever for its use by other parties, and makes no guarantees, expressed or implied, about its quality, reliability, or any other characteristic.

We would appreciate acknowledgement if the software is incorporated in redistributable libraries or applications.


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Roldan Pozo