Support 'interpolation' keyword in pandas.DataFrame.quantile and pandas.Series.quantile #10174
Description
interpolation : {‘linear’, ‘lower’, ‘higher’, ‘midpoint’, ‘nearest’}
This would make it consistent with numpy.percentile options (new in 1.9). See http://docs.scipy.org/doc/numpy-dev/reference/generated/numpy.percentile.html