Скачать или смотреть R Dates and Times // Introduction to handling Dates and Times in base R

R Dates and Times // Introduction to handling Dates and Times in base R

This video will show you how to handle DATES and TIMES base R (as.Date, format, strptime, POSIXct, POSIXlt)

A common need that exists in most of the programming languages is parsing strings into dates and converting dates into strings. Mastering this process is of vital importance for data analysts/data scientist because we get data from many different sources and countries where format changes, and for dates this is typically a headache. For instance, "31st of January of 2021" can be written as:

01/31/21: US format
January the 31, 2021: US format
31/01/21: typically European format
31.01.21: typically German format
31-01-21: typically English format
31/JAN/21: variation of English format
31 January 2021: variation of English format

Conversely, in many occasions we have to extract specific parts of the date like day of week, calendar week, month name, day name, etc. or we need to produce a long string containing date parts embedded with text like in this example "today is Monday of week 23 (2021)".

In this recipe we are going to learn how we can do this transformations in base R (we will not cover lubridate nor the new kid on the block: clock.



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