Performance improvement by forcing float64: http://stackoverflow.com/questions/18701569/pandas-dataframe-mean-very-slow-how-can-i-calculate-means-of-columns-faster
Performance improvement by forcing float64:
http://stackoverflow.com/questions/18701569/pandas-dataframe-mean-very-slow-how-can-i-calculate-means-of-columns-faster

herberthudson/pynance,aisthesis/pynance,herberthudson/pynance,aisthesis/pynance