Publicly Available Code Packages
optBINS (also known as the Knuth Method or Knuth's Rule)
Optimal binning methods for histogram models (piecewise-constant probability densities)
For details please see the paper at: http://arxiv.org/abs/physics/0605197
Please cite as:
Knuth K.H. 2006. Optimal Data-Based Binning for Histograms, arXiv:physics/0605197 [physics.data-an]
This data-based method for determining the number of bins in a histogram is now implemented in Mathematica as the Knuth Method and in AstroML as Knuth's Rule.
Download optBINS here