{"id":8139,"date":"2022-09-12T02:51:04","date_gmt":"2022-09-11T21:21:04","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-extract-date-and-time-from-datetime-field-in-r\/"},"modified":"2022-09-12T02:51:04","modified_gmt":"2022-09-11T21:21:04","slug":"solved-extract-date-and-time-from-datetime-field-in-r","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-extract-date-and-time-from-datetime-field-in-r\/","title":{"rendered":"[Solved] Extract date and time from datetime field in R"},"content":{"rendered":"

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If I understood well, R can read correctly your dates and times as you import your data (because they are in POSIXct format), but you can not extract the date and the time in the right format from your date-time column.<\/p>\n

Considering that you have a data.frame in R, like this:<\/p>\n

            date_time Sold\n1 2020-01-01 03:16:01    2\n2 2020-01-02 02:15:12    2\n3 2020-01-03 08:26:11    3\n4 2020-01-04 09:29:14    2\n5 2020-01-05 12:06:06    1\n6 2020-01-06 08:08:11    3\n<\/code><\/pre>\n
Lubridate does not offer a function to extract the time component, so you have to extract piece by piece with the minute(), hour() and second() functions. Then you can just concatenate these components with paste() function. Now, with the dates, you can use the date() function to extract then, after that, you use the format() function to format these dates in the way you want.<\/p>\n
library(lubridate)\nlibrary(dplyr)\nlibrary(magrittr)\n\ntab <- tab %>% \n  mutate(\n    date = as.Date(date_time),\n    hour = hour(date_time),\n    minute = minute(date_time),\n    second = second(date_time)\n  ) %>% \n  mutate(\n    format_date = format(date, \"%m\/%d\/%Y\"),\n    format_hour = paste(hour, minute, second, sep = \":\")\n  )\n<\/code><\/pre>\n
Resulting this:<\/p>\n
tab %>% select(format_date, format_hour) %>% head()\n\n  format_date format_hour\n1  01\/01\/2020     12:4:23\n2  01\/02\/2020     3:19:13\n3  01\/03\/2020      8:6:24\n4  01\/04\/2020      6:28:2\n5  01\/05\/2020     2:16:20\n6  01\/06\/2020     12:8:28\n<\/code><\/pre>\n<\/p><\/div>\n
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solved Extract date and time from datetime field in R <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] If I understood well, R can read correctly your dates and times as you import your data (because they are in POSIXct format), but you can not extract the date and the time in the right format from your date-time column. Considering that you have a data.frame in R, like this: date_time Sold 1 … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[2294,321],"class_list":["post-8139","post","type-post","status-publish","format-standard","hentry","category-solved","tag-lubridate","tag-r"],"yoast_head":"\n[Solved] Extract date and time from datetime field in R - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-extract-date-and-time-from-datetime-field-in-r\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Extract date and time from datetime field in R - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] If I understood well, R can read correctly your dates and times as you import your data (because they are in POSIXct format), but you can not extract the date and the time in the right format from your date-time column. 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