[R] why is as.date function not working for me? (dd/mm/yyyy h:mm)

[arun]

HI,

The question is not clear.  If it is to get the hours,
 strptime(dates, format="%d/%m/%Y %H:%M")$hour
# [1]  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23  0
#or
 as.numeric(format(as.POSIXct(dates, format="%d/%m/%Y %H:%M"),"%H"))
# [1]  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23  0
#or
as.numeric(gsub(".*\\s+(\\d+)\\:.*","\\1",dates))
 #[1]  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23  0
A.K. 


Why am I know getting hours after I convert the date? 

 dates <- c('31/12/2013 0:00',  '31/12/2013 1:00', 
 '31/12/2013 2:00',  '31/12/2013 3:00',  '31/12/2013 4:00',  '31/12/2013
 5:00',  '31/12/2013 6:00',  '31/12/2013 7:00',  '31/12/2013 8:00', 
 '31/12/2013 9:00', '31/12/2013 10:00', '31/12/2013 11:00',  '31/12/2013
 12:00', '31/12/2013 13:00', '31/12/2013 14:00', '31/12/2013 15:00', 
 '31/12/2013 16:00', '31/12/2013 17:00', '31/12/2013 18:00', '31/12/2013
 19:00', '31/12/2013 20:00', '31/12/2013 21:00', '31/12/2013 22:00', 
'31/12/2013 23:00',  '01/01/2014 0:00') 

as.Date(dates, format="%d/%m/%Y %H:%M") 
 [1] "2013-12-31" "2013-12-31" "2013-12-31" "2013-12-31" "2013-12-31" 
 [6] "2013-12-31" "2013-12-31" "2013-12-31" "2013-12-31" "2013-12-31" 
[11] "2013-12-31" "2013-12-31" "2013-12-31" "2013-12-31" "2013-12-31" 
[16] "2013-12-31" "2013-12-31" "2013-12-31" "2013-12-31" "2013-12-31" 
[21] "2013-12-31" "2013-12-31" "2013-12-31" "2013-12-31" "2014-01-01"