[R] Time format issue

[Ismail SEZEN]

>> The time column is factor. I want to convert each time to the following
>> format:
>> 
>> 20111211003000
>> 
>> 20111211013000
>> 
>> 20111211020000
>> 
>> (Year)(month)(date)(hr)(min)(sec)
> 
>> newTimeDt <- strptime(Time, format="%d%b%y:%H:%M")
>> newTimeDt
> [1] "2011-12-27 00:30:00 PST" "2011-12-27 01:30:00 PST" "2011-12-27 02:00:00 PST"
>> newTimeDt <- as.POSIXct(Time, format="%d%b%y:%H:%M")
>> newTimeDt
> [1] "2011-12-27 00:30:00 PST" "2011-12-27 01:30:00 PST" "2011-12-27 02:00:00 PST"
>> newOut <- format(newTimeDt, "%Y%m%d%H%M")
>> newOut
> [1] "201112270030" "201112270130" "201112270200"
>> newOut <- format(newTimeDt, "%Y%m%d%H%M%S")
>> newOut
> [1] "20111227003000" "20111227013000" "20111227020000"

Addition to David, if you use functions similar to read.csv or read.table to read dates from a file, you have to set 

stringsAsFactors = T

in function parameters or set data.frame column as character seperately.


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