- adding initial attribute to Natural_Breaks. this will slow things down, but   result in more "stable" results if you reclassify the same data again with   Natural_Breaks.
- adding initial attribute to Natural_Breaks. this will slow things down, but
  result in more "stable" results if you reclassify the same data again with
  Natural_Breaks.

  There is a tradeoff here between speed and consistency of the classification
  - no free lunch. If you want more speed, set initial to a smaller value (0
    would result in the best speed, if you want more consistent classes in
    multiple runs of Natural_Breaks on the same data, set initial to a higer
    value.

AlanZatarain/pysal,AlanZatarain/pysal,tectronics/pysal,Alwnikrotikz/pysal,tectronics/pysal,tectronics/pysal,AlanZatarain/pysal,Alwnikrotikz/pysal,Alwnikrotikz/pysal