日期时间转换——R中从非标准格式到标准明确格式

Question

I am currently working with a data set with a million rows where all of the dates are not in the standard unambiguous format that R requires. I have worked on trying to reformat the date-time to the standard unambiguous format but have had zero luck. I have tried using functions such as format , as.POSIXlt and as.POSIXct but with no luck.

The format is currently "%m/%d/%Y %H:%M:%OS" and I need to reformat it as "%Y/%m/%d %H:%M:%OS" .

Any help is appreicated.

Answer 1

Using the lubridate package from tidyverse, you can readily convert to your desired format.

library(lubridate)
oldformat <- as.character("10/13/2022 01:12:33")
newformat <- mdy_hms(oldformat)