On 01/02/2019 10:45 p.m., C W wrote:
Dear R community,
I am working with dates. And I get the following error:
strftime(dat[20], format="%H:%M")
Error in as.POSIXlt.character(as.character(x), ...) :
character string is not in a standard unambiguous format
You are using the wrong function: strftime() formats a time object as a
character string. You want strptime() to convert character (or factor
in your case) to a time object.
But you need to give the format for the full string, not just the time
at the end.
If you really were intending to extract times from dat, then you need
both conversions:
> strftime(strptime(dat, format="%m/%d/%y %H:%M"), format = "%H:%M")
[1] "11:32" "11:42" "12:17" "12:31" "12:50" "14:10" "14:19" "14:59"
"15:57" "16:00" "16:46" "16:51" "17:35" "17:59" "18:17" "19:07" "19:08"
[18] "19:31" "21:21" "06:00" "06:20" "06:37" "06:40" "06:46" "07:20"
"07:47" "07:50" "07:54" "08:11" "08:23" "08:31" "08:33" "08:43" "09:04"
[35] "09:09" "09:30" "09:59" "10:01" "10:03" "10:05"
Duncan Murdoch
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