Panel4D.apply()

Panel4D.apply(func, axis='major', **kwargs) [source]

Applies function along axis (or axes) of the Panel

Parameters:

Parameters:	func : function Function to apply to each combination of ?other? axes e.g. if axis = ?items?, the combination of major_axis/minor_axis will each be passed as a Series; if axis = (?items?, ?major?), DataFrames of items & major axis will be passed axis : {?items?, ?minor?, ?major?}, or {0, 1, 2}, or a tuple with two axes Additional keyword arguments will be passed as keywords to the function
Returns:	result : Panel, DataFrame, or Series

func : function

Function to apply to each combination of ?other? axes e.g. if axis = ?items?, the combination of major_axis/minor_axis will each be passed as a Series; if axis = (?items?, ?major?), DataFrames of items & major axis will be passed

axis : {?items?, ?minor?, ?major?}, or {0, 1, 2}, or a tuple with two

axes

Additional keyword arguments will be passed as keywords to the function

Returns:

result : Panel, DataFrame, or Series

Examples

Returns a Panel with the square root of each element

>>> p = pd.Panel(np.random.rand(4,3,2))
>>> p.apply(np.sqrt)

Equivalent to p.sum(1), returning a DataFrame

1	`>>> p.apply(lambda` `x: x.sum(), axis=1)`

Equivalent to previous:

1	`>>> p.apply(lambda` `x: x.sum(), axis='minor')`

Return the shapes of each DataFrame over axis 2 (i.e the shapes of items x major), as a Series

1	`>>> p.apply(lambda` `x: x.shape, axis=(0,1))`

Links:

http://pandas.pydata.org/pandas-docs/version/0.19.2/generated/pandas.Panel4D.apply.html

doc_Pandas

2025-01-10 15:47:30

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