**Zachary karate club**

# Zachary karate club

## About this network

This is the well-known and much-used Zachary karate club network. The data was collected from the members of a university karate club by Wayne Zachary in 1977. Each node represents a member of the club, and each edge represents a tie between two members of the club. The network is undirected. An often discussed problem using this dataset is to find the two groups of people into which the karate club split after an argument between two teachers.

## Network info

Code | ZA |

Category | ⬤ HumanSocial |

Data source | http://vlado.fmf.uni-lj.si/pub/networks/data/ucinet/ucidata.htm#zachary |

Vertex type | Member |

Edge type | Tie |

Format | Undirected |

Edge weights | Unweighted |

Size | 34 vertices (members) |

Volume | 78 edges (ties) |

Average degree | 4.5882 edges / vertex |

Fill | 0.13904 edges / vertex^{2} |

Maximum degree | 17 edges |

Size of LCC | 34 vertices (network is connected) |

Wedge count | 528 |

Claw count | 1,764 |

Triangle count | 45 |

Square count | 154 |

4-tour count | 3,500 |

Power law exponent (estimated) with d_{min} | 2.1610 (d_{min} = 2) |

Gini coefficient | 38.5% |

Relative edge distribution entropy | 92.5% |

Assortativity | –0.47561 |

Clustering coefficient | 25.6% |

Diameter | 5 edges |

90-percentile effective diameter | 3.44 edges |

Effective diameter | 3.5609 edges (estimated) |

Mean shortest path length | 2.44 edges |

Spectral norm | 6.7257 |

Algebraic connectivity | 0.46853 |

## Downloads

TSV file: | ucidata-zachary.tar.bz2 (1.83 KiB) |

Extraction code: | ucidata.tar.bz2 (15.80 KiB) |

RDF: | ucidata-zachary.n3.bz2 (1023 bytes) |