search
Search
Login
Math ML Join our weekly DS/ML newsletter
menu
menu search toc more_vert
Robocat
Guest 0reps
Thanks for the thanks!
close
Comments
Log in or sign up
Cancel
Post
account_circle
Profile
exit_to_app
Sign out
help Ask a question
Share on Twitter
search
keyboard_voice
close
Searching Tips
Search for a recipe:
"Creating a table in MySQL"
Search for an API documentation: "@append"
Search for code: "!dataframe"
Apply a tag filter: "#python"
Useful Shortcuts
/ to open search panel
Esc to close search panel
to navigate between search results
d to clear all current filters
Enter to expand content preview
icon_star
Doc Search
icon_star
Code Search Beta
SORRY NOTHING FOUND!
mic
Start speaking...
Voice search is only supported in Safari and Chrome.
Navigate to
A
A
brightness_medium
share
arrow_backShare
Twitter
Facebook

Pandas | infer_freq method

Pandas
chevron_right
Documentation
chevron_right
General Functions
schedule Jul 1, 2022
Last updated
local_offer PythonPandas
Tags
tocTable of Contents
expand_more

Pandas infer_freq(~) method returns a string indicating the inferred frequency of the given DatetimeIndex or a TimedeltaIndex.

Parameters

1. indexlink | DatetimeIndex or TimedeltaIndex

The index from which to infer the frequency.

2. warn | boolean | optional

Whether or not to print warning message if the frequency cannot be inferred. Upon testing, this parameter seems to not do anything. By default, warn=True.

NOTE

This method can raise the following errors:

  • a ValueError is thrown if the index has fewer than 3 dates.

  • a TypeError is thrown if the index is not of type datetime-like.

Return Value

A string indicating the inferred frequency.

Examples

Basic usage

Consider the following DatetimeIndex:

idx = pd.DatetimeIndex(["2020-12-25","2020-12-27","2020-12-29"])
idx
DatetimeIndex(['2020-12-25', '2020-12-27', '2020-12-29'], dtype='datetime64[ns]', freq=None)

Because we did not explicitly specify the freq parameter in the constructor, we end up with freq=None.

To infer the frequency:

pd.infer_freq(idx)
'2D'

This tells us that the inferred frequency (offset) is 2 days.

mail
Join our newsletter for updates on new DS/ML comprehensive guides (spam-free)
robocat
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
1
thumb_down
0
chat_bubble_outline
0
settings
Enjoy our search
Hit / to insta-search docs and recipes!