I am having a lot of problems converting a char data.frame into a POSIXlt. This is my str output:
'data.frame': 5846 obs. of 5 variables:
$ date : Factor w/ 184 levels "1/1/2015","1/10/2015",..: 31 31 31 31 31 31 31 31 31 31 ...
$ time : Factor w/ 680 levels "1:00:00","1:01:00",..: 63 72 72 73 73 75 75 75 76 76 ...
$ morning: Factor w/ 2 levels "AM","PM": 2 2 2 2 2 2 2 2 2 2 ...
$ sender : Factor w/ 2 levels "Judith:","Saul": 2 1 1 2 2 1 2 2 1 1 ...
$ iso : chr "1/8/2014 10:10:00 PM" "1/8/2014 10:19:00 PM" "1/8/2014 10:19:00 PM" "1/8/2014 10:20:00 PM" ..
I want to convert "iso" into POSIXlt using
dat$iso <- strptime(dat$iso, "%d/%m/%Y %I:%M:%S %p")
But I get NA as a result.
I get a similar output when doing
> iso = "1/8/2014 10:19:00 PM"
> strptime(iso,"%d/%m/%Y %I:%M:%S %p")
[1] NA
This is due to my default locale (fr_FR) that does not support %p. Changing this locale to "C", solves the problem:
> Sys.setlocale(category = "LC_TIME","C")
> strptime(iso,"%d/%m/%Y %I:%M:%S %p")
[1] "2014-08-01 22:19:00 CEST"