问题

I would only like to extract '2021' from this.

By the way, the class for this variable is 'character'.

英文:

I have some date/times in a variable where I would only like to extract the year.

Here is an example:

2/14/21 4:55

I would only like to extract '2021' from this.

By the way, the class for this variable is 'character'.

&gt; class(df$DTS)
[1] &quot;character&quot;

答案1

得分: 2

以下是一个基本的R解决方案：

as.numeric(format(as.POSIXct("2/10/21 6:55", format = "%m/%d/%y %H:%M"), "%Y"))

[1] 2021


<details>
<summary>英文:</summary>

Here is a base R solution:

as.numeric(format(as.POSIXct("2/10/21 6:55", format = "%m/%d/%y %H:%M"), "%Y"))

[1] 2021



</details>



# 答案2
**得分**: 1

library(lubridate)
"2/10/21 6:55" |> mdy_hm() |> year()


<details>
<summary>英文:</summary>

library(lubridate)
"2/10/21 6:55" |> mdy_hm() |> year()


</details>

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