How to Extract Year from Date in R

In this article, we are going to see how to extract the year from the date in R Programming Language.

Method 1:  Extract Year from a Vector

In this method, the as.POSIXct is a Date-time Conversion Functions that is used to manipulate objects of classes. To extract the year from vector we need to create a vector with some dates and then arrange the date with as.POSIXct() and  get year with format() methods.

Output:

[1] "Vector Date:"
[1] "01/12/2011 12:40:00" "11/12/2015 11:40:00" "01/02/2012 05:40:00"
[4] "01/04/2021 09:44:00" "01/02/2020 01:43:00" "01/12/2014 04:41:00"

[1] "Extract Year:"
'2011' '2015' '2012' '2021' '2020' '2014'

Method 2: Extract Year from a Column in a Dataframe

To extract the year from the column, we will create a dataframe with date columns and then separate the year from DateTime using format() methods and extract the year and convert to a numeric format.

Output:

[1] "Original dataframe"
Rank Time
5 2021-05-05 01:04:34
6 2021-03-06 03:14:44
7 2021-03-11 07:22:48
8 2021-02-02 11:54:56

Extract year
Rank Time year
5 2021-05-05 2021
6 2021-03-06 2021
7 2021-03-11 2021
8 2021-02-02 2021