Open In App

Python | Pandas DatetimeIndex.dayofyear

Improve
Improve
Like Article
Like
Save
Share
Report

Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric python packages. Pandas is one of those packages and makes importing and analyzing data much easier.

Pandas DatetimeIndex.dayofyear attribute outputs the ordinal value of the day of the year for each entries of the DatetimeIndex object.

Syntax: DatetimeIndex.dayofyear

Return: Index object

Example #1: Use DatetimeIndex.dayofyear attribute to find the ordinal value of the day of the year for each entries in the DatetimeIndex object.




# importing pandas as pd
import pandas as pd
  
# Create the DatetimeIndex
# Here 'W' represents Weekly frequency
didx = pd.DatetimeIndex(start ='2000-01-10 06:30', freq ='W'
                            periods = 3, tz ='Asia/Calcutta')
  
# Print the DatetimeIndex
print(didx)


Output :

Now we want to find ordinal value of day for each entries in the DatetimeIndex object.




# find the ordinal value of the day 
# for each entries present in the object
didx.dayofyear


Output :

As we can see in the output, the function has returned an Index object containing the ordinal values of the days present in each entry of the DatetimeIndex object.
 
Example #2: Use DatetimeIndex.dayofyear attribute to find the ordinal value of the day of the year for each entries in the DatetimeIndex object.




# importing pandas as pd
import pandas as pd
  
# Create the DatetimeIndex
# Here 'M' represents Monthly frequency
didx = pd.DatetimeIndex(start ='2014-08-01 10:05:45', freq ='M',
                               periods = 5, tz ='Asia/Calcutta')
  
# Print the DatetimeIndex
print(didx)


Output :

Now we want to find ordinal value of day for each entries in the DatetimeIndex object.




# find the ordinal value of the day 
# for each entries present in the object
didx.dayofyear


Output :

As we can see in the output, the function has returned an Index object containing the ordinal values of the days present in each entry of the DatetimeIndex object.



Last Updated : 24 Dec, 2018
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads