Python | Pandas DatetimeIndex.to_perioddelta()
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.to_perioddelta() function calculate TimedeltaIndex of difference between index values and index converted to periodIndex at specified frequency. It is used for vectorized offsets.
Syntax: DatetimeIndex.to_perioddelta(freq)
Parameters :
freq : One of pandas’ offset strings or an Offset object. Will be inferred by defaultReturn : TimedeltaIndex
Example #1: Use DatetimeIndex.to_perioddelta() function to calculate the TimedeltaIndex of difference between index values and index converted to periodIndex at specified frequency
# importing pandas as pd import pandas as pd # Create the DatetimeIndex # Here 'S' represents secondly frequency didx = pd.DatetimeIndex(start ='2018-11-15 09:45:10', freq ='S', periods = 5) # Print the DatetimeIndex print(didx) |
Output :
Now we want to calculate the TimedeltaIndex of difference between index values and index converted to periodIndex
# calculate the TimedeltaIndex # 'T' represents minute based frequency didx.to_perioddelta('T') |
Output :
As we can see in the output, the returned the difference between the index values and index converted to periodIndex.
Example #2: Use DatetimeIndex.to_perioddelta() function to calculate the TimedeltaIndex of difference between index values and index converted to periodIndex at specified frequency.
# importing pandas as pd import pandas as pd # Create the DatetimeIndex # Here 'T' represents minutely frequency didx = pd.DatetimeIndex(start ='2015-03-02 01:15:12', freq ='T', periods = 5) # Print the DatetimeIndex print(didx) |
Output :
Now we want to calculate the TimedeltaIndex of difference between index values and index converted to periodIndex
# calculate the TimedeltaIndex # 'H' represents hourly frequency didx.to_period('H') |
Output :
As we can see in the output, the returned the difference between the index values and index converted to periodIndex.
