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Panel.apply(func, axis='major', **kwargs)[source] -
Applies function along axis (or axes) of the Panel
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
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
>>> p.apply(lambda x: x.sum(), axis=1)
Equivalent to previous:
>>> 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
>>> p.apply(lambda x: x.shape, axis=(0,1))
Panel.apply()
2017-01-12 04:50:46
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