chevron_left
Time Series Cookbook
Adding new column containing the difference between two date columnsCombining columns containing date and timeCombining columns of years, months and daysConverting a column of strings to datetimeConverting dates to stringsConverting datetime column to date and time columnsConverting DatetimeIndex to Series of datetimeConverting index to datetimeConverting UNIX timestamp to datetimeCreating a column of datesCreating a range of datesExtracting month and year from Datetime columnGetting all weekdays between two datesGetting all weekends between two datesGetting day unit from date columnGetting month unit from date columnGetting name of months in date columnGetting week numbers from a date columnGetting day of week of date columnsGetting year unit from date columnModifying datesOffsetting datetimeRemoving time unit from datesSetting date to beginning of monthSorting DataFrame by datesUsing dates as the index of a DataFrame
thumb_up
0
thumb_down
0
chat_bubble_outline
0
auto_stories new
settings
Adding new column containing the difference between two date columns in Pandas DataFrame
Programming
chevron_rightPython
chevron_rightPandas
chevron_rightCookbooks
chevron_rightDataFrame Cookbooks
chevron_rightTime Series Cookbook
schedule Jul 1, 2022
Last updated local_offer Python●Pandas
Tags tocTable of Contents
expand_more Consider the following DataFrame:
dates1 = pd.date_range(start="2020/12/15", periods=3)dates2 = pd.date_range(start="2020/12/20", periods=3, freq="2D")df = pd.DataFrame({"A":dates1, "B":dates2})df
A B0 2020-12-15 2020-12-201 2020-12-16 2020-12-222 2020-12-17 2020-12-24
Pandas allows for date arithmetics using the standard binary operators (e.g. +
, -
):
df["C"] = df["B"] - df["A"]df
A B C0 2020-12-15 2020-12-20 5 days1 2020-12-16 2020-12-22 6 days2 2020-12-17 2020-12-24 7 days
Here, column C
is of type timedelta64[ns]
, which explains why the term "days"
is appended. To remove the "days"
, use dt.days
to extract the day unit as an int64
:
df["C"] = (df["B"] - df["A"]).dt.daysdf
A B C0 2020-12-15 2020-12-20 51 2020-12-16 2020-12-22 62 2020-12-17 2020-12-24 7
Join our newsletter for updates on new DS/ML comprehensive guides (spam-free)
Published by Isshin Inada
Edited by 0 others
Did you find this page useful?
thumb_up
thumb_down
Ask a question or leave a feedback...
thumb_up
0
thumb_down
0
chat_bubble_outline
0
settings
Enjoy our search
Hit / to insta-search docs and recipes!