MATLAB: How to find the difference b/w two string time and to convert in to seconds.

datedatenumMATLABtime convertion

In my code time data is as given below. eg. '12.56.13' 12.57.39'. Now how to find the difference b/w the two given time and to convert the obtained value in to seconds. How to pass the obtained seconds to timer. I am having time data of size 45 lake rows. I want efficient way to find the above.

Regards Manu M.J

Best Answer

datenum() the strings, subtract. To convert the time difference to seconds, multiply by 24*60*60 (number of seconds in a day). To "pass" the obtained seconds to a timer, set the timer StartDelay property to that number of seconds -- and remember to start() the timer.

Related Solutions

MATLAB: Formulating elapsed time in hours for input data…

In MATLAB R2014b or later, use datetime. With your date_str variable converted to a cell array of strings:

>> d = datetime(cellstr(date_str))
d = 
   05-Jun-2015 14:17:36
   05-Jun-2015 14:17:36
   05-Jun-2015 14:17:36
   05-Jun-2015 14:17:36
   05-Jun-2015 14:17:36
   05-Jun-2015 14:17:39
   05-Jun-2015 14:17:39
   ...
   05-Jun-2015 14:26:47
>> t1 = d - d(1); t1.Format = 'h' % elapsed since first
t1 = 
            0 hrs
            0 hrs
            0 hrs
            0 hrs
            0 hrs
   0.00083333 hrs
   0.00083333 hrs
   ...
      0.15306 hrs
>> t2 = diff(d); t2.Format = 'h' % successive diffs
t2 = 
            0 hrs
            0 hrs
            0 hrs
            0 hrs
   0.00083333 hrs
            0 hrs
            0 hrs
   ...
     0.053333 hrs

Those create durations. If you need double values, wrap the hours function around them. Hope this helps.

MATLAB: How to pause the execution of one timer while continuing to execute another timer in MATLAB 7.8 (R2009a)

The PAUSE statement in the timer's callback function will pause MATLAB execution completely. PAUSE will not stop the MATLAB execution if the PAUSE is outside the timer's TimerFcn callback.

To pause timer's execution,you can use timer's 'StartDelay' property. You can stop the timer at a certain point, set 'StartDelay' property of a timer, and then start the timer again. The timer's execution will start after 'StartDelay' amount of time elapses. Consider the following example:

function timer_test
t1 = timer('ExecutionMode','fixedRate','TimerFcn','disp(''Timer ONE is executing'')');
t2 = timer('ExecutionMode','fixedRate','TimerFcn','disp(''Timer TWO is executing'')');
% start both timers
start(t1)
start(t2)
% the timers continue executing despite the PAUSE statement
pause(3)
%stop the 1st timer
stop(t1)
disp('Timer 1 is stopped. Its execution will start in 3 seconds')
% set the timer's StartDelay property to introduce the pause in timer's execution
set(t1,'StartDelay',3)
%start the timer, it will start executing after 3 seconds have elapsed.
start(t1)
% continue running timers for 5 more seconds then stop the timers and delete them
pause(5)
stop(t1)
stop(t2)
delete(t1)
delete(t2)

Best Answer

Related Solutions

MATLAB: Formulating elapsed time in hours for input data…

MATLAB: How to pause the execution of one timer while continuing to execute another timer in MATLAB 7.8 (R2009a)

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