How to Convert Date to Numeric in R?

In this article, we will discuss how to convert date to numeric in R Programming Language.

Method 1: Using as.numeric()

This function is used to convert date into numeric

Syntax:

as.numeric(date)

where the date is the input date.

Example:

Output:

[1] "2021-01-01 01:05:00 UTC"
[1] 1609463100

If we want to get the number of days from the number, divide the number by 86400.

as.numeric(date)/86400

If we want to get the number of years from date, then divide it by 365.

as.numeric(date)/86400/365

Example: R program to convert dates into days and years

Output:

[1] "2021-01-01 01:05:00 UTC"
[1] 1609463100
[1] 18628.05
[1] 51.03574

Method 2: Use functions from lubridate package

Here, By using this module, we can get the day, month, year, hour, minute, and second separately in integer format.

Syntax:

day:
day(date)

month:
month(date)

year:
year(date)

hour:
hour(date)

minute:
minute(date)

second:
second(date)

Example:

Output:

[1] "2021-01-01 01:05:00 UTC"
[1] 1
[1] 1
[1] 2021
[1] 1
[1] 5
[1] 0