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pandas.core.groupby.GroupBy.rank

GroupBy.rank(method='average', ascending=True, na_option='keep', pct=False, axis=0) [source]

Provides the rank of values within each group.

Parameters:

method : {‘average’, ‘min’, ‘max’, ‘first’, ‘dense’}, default ‘average’

  • average: average rank of group
  • min: lowest rank in group
  • max: highest rank in group
  • first: ranks assigned in order they appear in the array
  • dense: like ‘min’, but rank always increases by 1 between groups

ascending : boolean, default True

False for ranks by high (1) to low (N)

na_option : {‘keep’, ‘top’, ‘bottom’}, default ‘keep’

  • keep: leave NA values where they are
  • top: smallest rank if ascending
  • bottom: smallest rank if descending

pct : boolean, default False

Compute percentage rank of data within each group

axis : int, default 0

The axis of the object over which to compute the rank.

Returns
—–
DataFrame with ranking of values within each group

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Licensed under the 3-clause BSD License.
http://pandas.pydata.org/pandas-docs/version/0.23.4/generated/pandas.core.groupby.GroupBy.rank.html