Cell array filtering date and time using datenum

I have a cell array that consists of dates and time in the following format '30/12/2015 15:54:30'.

Using this code

numFormat = datenum(X{:,1},'dd/mm/yyyy HH:MM:SS');
Y(:,1)= round(numFormat);
Y(:,2)= hour(numFormat)*60 + minute(numFormat);

I get the error message: Error using datenum. Too many input arguments.

Answer 1

[per isakson]

Replace X{:} by char(X)

>> X = {'30/12/2015 15:54:30';'30/12/2015 15:54:30';'30/12/2015 15:54:30'};
>> numFormat = datenum(char(X),'dd/mm/yyyy HH:MM:SS')
numFormat =
   1.0e+05 *
    7.3633
    7.3633
    7.3633

Answer 2

[Peter Perkins]

Think about using datetime and duration instead of datenum:

>> dt = datetime({'30/12/2015 15:54:30';'30/12/2015 15:54:30';'30/12/2015 15:54:30'},'InputFormat','dd/MM/yyyy HH:mm:ss')
dt = 
  3×1 datetime array
   30-Dec-2015 15:54:30
   30-Dec-2015 15:54:30
   30-Dec-2015 15:54:30
>> d = dateshift(dt,'start','day')
d = 
  3×1 datetime array
   30-Dec-2015 00:00:00
   30-Dec-2015 00:00:00
   30-Dec-2015 00:00:00
>> t = timeofday(dt)
t = 
  3×1 duration array
   15:54:30
   15:54:30
   15:54:30