Python | Pandas Series.argmax()
Pandas series is a One-dimensional ndarray with axis labels. The labels need not be unique but must be a hashable type. The object supports both integer- and label-based indexing and provides a host of methods for performing operations involving the index.
Pandas Series.argmax()
function returns the row label of the maximum value in the given series object.
Syntax: Series.argmax(axis=0, skipna=True, *args, **kwargs)
Parameter :
skipna : Exclude NA/null values. If the entire Series is NA, the result will be NA.
axis : For compatibility with DataFrame.idxmax. Redundant for application on Series.
*args, **kwargs : Additional keywords have no effect but might be accepted for compatibility with NumPy.
Returns : idxmax : Index of maximum of values.
Example #1: Use Series.argmax()
function to return the row label of the maximum value in the given series object
import pandas as pd
sr = pd.Series([ 34 , 5 , 13 , 32 , 4 , 15 ])
index_ = [ 'Coca Cola' , 'Sprite' , 'Coke' , 'Fanta' , 'Dew' , 'ThumbsUp' ]
sr.index = index_
print (sr)
|
Output :
Coca Cola 34
Sprite 5
Coke 13
Fanta 32
Dew 4
ThumbsUp 15
dtype: int64
Now we will use Series.argmax()
function to return the row label of the maximum value in the given series object.
result = sr.argmax()
print (result)
|
Output :
Coca Cola
As we can see in the output, the Series.argmax()
function has successfully returned the row label of the maximum value in the given series object.
Example #2 : Use Series.argmax()
function to return the row label of the maximum value in the given series object.
import pandas as pd
sr = pd.Series([ 11 , 21 , 8 , 18 , 65 , 18 , 32 , 10 , 5 , 32 , None ])
index_ = pd.date_range( '2010-10-09 08:45' , periods = 11 , freq = 'Y' )
sr.index = index_
print (sr)
|
Output :
2010-12-31 08:45:00 11.0
2011-12-31 08:45:00 21.0
2012-12-31 08:45:00 8.0
2013-12-31 08:45:00 18.0
2014-12-31 08:45:00 65.0
2015-12-31 08:45:00 18.0
2016-12-31 08:45:00 32.0
2017-12-31 08:45:00 10.0
2018-12-31 08:45:00 5.0
2019-12-31 08:45:00 32.0
2020-12-31 08:45:00 NaN
Freq: A-DEC, dtype: float64
Now we will use Series.argmax()
function to return the row label of the maximum value in the given series object.
result = sr.argmax()
print (result)
|
Output :
2014-12-31 08:45:00
As we can see in the output, the Series.argmax()
function has successfully returned the row label of the maximum value in the given series object.
Last Updated :
27 Feb, 2019
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