pandas.pivot_table

 

 

pandas.pivot_table — pandas 1.3.5 documentation (pydata.org)

pandas.pivot_table(datavalues=Noneindex=Nonecolumns=Noneaggfunc='mean'fill_value=Nonemargins=Falsedropna=Truemargins_name='All'observed=Falsesort=True)[source]

 

Create a spreadsheet-style pivot table as a DataFrame.

The levels in the pivot table will be stored in MultiIndex objects (hierarchical indexes) on the index and columns of the result DataFrame.

Parameters
dataDataFrame
valuescolumn to aggregate, optional
indexcolumn, Grouper, array, or list of the previous

If an array is passed, it must be the same length as the data. The list can contain any of the other types (except list). Keys to group by on the pivot table index. If an array is passed, it is being used as the same manner as column values.

columnscolumn, Grouper, array, or list of the previous

If an array is passed, it must be the same length as the data. The list can contain any of the other types (except list). Keys to group by on the pivot table column. If an array is passed, it is being used as the same manner as column values.

aggfuncfunction, list of functions, dict, default numpy.mean

If list of functions passed, the resulting pivot table will have hierarchical columns whose top level are the function names (inferred from the function objects themselves) If dict is passed, the key is column to aggregate and value is function or list of functions.

fill_valuescalar, default None

Value to replace missing values with (in the resulting pivot table, after aggregation).

marginsbool, default False

Add all row / columns (e.g. for subtotal / grand totals).

dropnabool, default True

Do not include columns whose entries are all NaN.

margins_namestr, default ‘All’

Name of the row / column that will contain the totals when margins is True.

observedbool, default False

This only applies if any of the groupers are Categoricals. If True: only show observed values for categorical groupers. If False: show all values for categorical groupers.

Changed in version 0.25.0.

sortbool, default True

Specifies if the result should be sorted.

New in version 1.3.0.

Returns
DataFrame

An Excel style pivot table.

 

 

 

 

 

 

 

 

 

 

posted @ 2022-01-03 00:03  limalove  阅读(24)  评论(0编辑  收藏  举报