Pandas Series dt.dayofyear | Get Day of Year in Pandas
Pandas dt.dayofyear attribute returns the ordinal day of the year in the underlying DateTime data in the given Series object.
Example:
Python3
import pandas as pd sr = pd.Series([ '2012-10-21 09:30' , '2019-7-18 12:30' , '2008-02-2 10:30' , '2010-4-22 09:25' , '2019-11-8 02:22' ]) idx = [ 'Day 1' , 'Day 2' , 'Day 3' , 'Day 4' , 'Day 5' ] sr.index = idx sr = pd.to_datetime(sr) result = sr.dt.dayofyear print (result) |
Output
Syntax
Syntax: Series.dt.dayofyear
Parameter: None
Returns: Series with integers indicating the day number
How to Get Day of Year for a Date in Pandas Series
To get the day number for a date in the Pandas Series we use the dt.dayofyear method of the Pandas Library in Python. It returns the ordinal day of the year for a date in the Series.
Let us understand it better with an example:
Example:
Use Series.dt.dayofyear attribute to return the ordinal day of the year in the underlying data of the given Series object.
Python3
# importing pandas as pd import pandas as pd # Creating the Series sr = pd.Series(pd.date_range( '2012-12-12 12:12' , periods = 5 , freq = 'M' )) # Creating the index idx = [ 'Day 1' , 'Day 2' , 'Day 3' , 'Day 4' , 'Day 5' ] # set the index sr.index = idx # Print the series print (sr) |
Output :
Now we will use the Series.dt.dayofyear attribute to return the ordinal day of the year in the DateTime based data in the given series object.
Python3
# return the day of year result = sr.dt.dayofyear # print the result print (result) |
Output :
As we can see in the output, the dt.dayofyear attribute has successfully accessed and returned the day of the year in the underlying data of the given series object.
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