How to get difference between two time values ?

How we will get difference between the below times. I tried with caldiff, diff, substraction commands its not working . Please help me if any one knows

Answer 1

[Dennis]

You can use etime, but you need to convert your strings first. I hope this helps:

a=datetime
pause(5)
b=datetime

a=datevec(a);
b=datevec(b);
etime(b,a)

Answer 2

[Peter Perkins]

Don't use etime. Use datetimes. Haritha, without more info it's hard to tell, but it looks like your "data" is a cellarray of char vectors. You have to start with the right kind of data. Do this:

>> c
c =
  4×1 cell array
    {'17-Apr-2019 11:40:10'}
    {'17-Apr-2019 11:40:12'}
    {'23-Apr-2019 16:11:41'}
    {'23-Apr-2019 16:11:47'}
>> t = datetime(c)
t = 
  4×1 datetime array
   17-Apr-2019 11:40:10
   17-Apr-2019 11:40:12
   23-Apr-2019 16:11:41
   23-Apr-2019 16:11:47
>> caldiff(t) % calendar unit diffs
ans = 
  3×1 calendarDuration array
        0h 0m 2s
   6d 4h 31m 29s
        0h 0m 6s
>> diff(t) % exact time times
ans = 
  3×1 duration array
    00:00:02
   148:31:29
    00:00:06
>> t - t(1) % offset from first time
ans = 
  4×1 duration array
    00:00:00
    00:00:02
   148:31:31
   148:31:37