Description Usage Arguments References Examples
View source: R/parse_date_time.R
Given a data.table with date-time strings, this function converts those dates-times to type POSIXct with the appropriate time zone. Assumption is that dates are of the form "2016-07-25T22:15:19Z" where T is just a separator and the last letter is a military timezone.
This is a side-effect-free function: it returns a new data.table and the input data.table is unmodified.
1 | parse_date_time(input_df, date_cols, assume_tz = "UTC")
|
input_df |
a data.table with one or more date-time columns you want to convert |
date_cols |
Character vector of column names to convert. Columns should have string dates of the form "2016-07-25T22:15:19Z". |
assume_tz |
Timezone to convert to if parsing fails. Default is UTC |
https://www.timeanddate.com/time/zones/military
https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | # Sample es_search(), chomp_hits(), or chomp_aggs() output:
someDT <- data.table::data.table(id = 1:5
, company = c("Apple", "Apple", "Banana", "Banana", "Cucumber")
, timestamp = c("2015-03-14T09:26:53B", "2015-03-14T09:26:54B"
, "2031-06-28T08:53:07Z", "2031-06-28T08:53:08Z"
, "2000-01-01"))
# Note that the date field is character right now
str(someDT)
# Let's fix that!
someDT <- parse_date_time(input_df = someDT
, date_cols = "timestamp"
, assume_tz = "UTC")
str(someDT)
|
Classes 'data.table' and 'data.frame': 5 obs. of 3 variables:
$ id : int 1 2 3 4 5
$ company : chr "Apple" "Apple" "Banana" "Banana" ...
$ timestamp: chr "2015-03-14T09:26:53B" "2015-03-14T09:26:54B" "2031-06-28T08:53:07Z" "2031-06-28T08:53:08Z" ...
- attr(*, ".internal.selfref")=<externalptr>
Classes 'data.table' and 'data.frame': 5 obs. of 3 variables:
$ id : int 1 2 3 4 5
$ company : chr "Apple" "Apple" "Banana" "Banana" ...
$ timestamp: POSIXct, format: "2015-03-14 09:26:53" "2015-03-14 09:26:54" ...
- attr(*, ".internal.selfref")=<externalptr>
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