Computational Evolutionary Biology & Bioinformatics

E-mail: msr@asu.edu
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*π-*index

### Example

### History

## References

The *π-*index (Vinkler 2009) is similar to other measures of the quality of the Hirsch core, except that it uses its own unique definition of the core. For this index, the core publication set *P _{π}* is defined as the square-root of the total number of publications, truncated down to the nearest integer (

The *π-*index is 1/100^{th} of the total citations within this core:

Publications are ordered by number of citations, from highest to lowest.

Citations (C)_{i} | 42 | 36 | 14 | 11 | 9 | 9 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 0 | 0 | 0 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|

Rank (i) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |

P = 4_{π} |

The *π-*core is the floor of the square-root of the total number of publications, thus *P _{π}* = floor(√16) = floor(4.00) = 4. The

Year | π |
---|---|

1997 | 0.0200 |

1998 | 0.0900 |

1999 | 0.2700 |

2000 | 0.4500 |

2001 | 1.0300 |

2002 | 1.7200 |

2003 | 2.5600 |

2004 | 3.8900 |

2005 | 5.3600 |

2006 | 7.1400 |

2007 | 9.9700 |

2008 | 12.2000 |

2009 | 14.6400 |

2010 | 17.2200 |

2011 | 20.6300 |

2012 | 22.0700 |

2013 | 23.5200 |

2014 | 25.5400 |

2015 | 27.6000 |

2016 | 32.1100 |

2017 | 34.0000 |

- Vinkler, P. (2009) The
*p-*index: A new indicator for assessing scientific impact.*Journal of Information Science*35(5):602–612.