pandas rank method
时间: 2023-10-01 10:12:11 浏览: 109
pandas的排序和排名的具体使用
The rank() method in Pandas is used to compute numerical data ranks (1 through n) along a specific axis. It assigns ranks to each element of a Series or DataFrame based on the order in which they appear.
Syntax: `DataFrame.rank(axis=0, method='average', numeric_only=None, na_option='keep', ascending=True, pct=False)`
Parameters:
- axis: int or string value, 0 (default) or ‘index’ for row-wise ranking and 1 or ‘columns’ for column-wise ranking.
- method: optional (default is ‘average’), method used for assigning ranks to tied elements. Other options are ‘min’, ‘max’, ‘first’, ‘dense’.
- numeric_only: bool or None (default), if True, only the numeric columns will be ranked.
- na_option: optional (default is ‘keep’), how to handle NaN values. Other options are ‘top’, ‘bottom’ and None.
- ascending: bool or list of bools (default is True), if True, the ranks are assigned in ascending order, otherwise in descending order.
- pct: bool (default is False), if True, the percentile rank of each element is returned instead of its ordinal rank.
Returns: DataFrame or Series with values ranging from 1 to n, where n is the number of non-null values.
阅读全文