how to generate random time format data in MATLAB?

Hi all, I am wondering how to generate random time format data (or series) in MATLAB between a range of time ? such as 12:00:23 , ......?

Thanks

Answer 1

[the cyclist]

Here's one way:

% Generate a random time (down to granularity of seconds)

% Parameters
NUMBER_RANDOM_TIMES = 100;

SECONDS_PER_DAY = 24*60*60;

START_DATE = '2013-01-01';
END_DATE   = '2013-06-30';

% Algorithm
startDateNum = datenum(START_DATE,'yyyy-mm-dd');
endDateNum   = datenum(END_DATE,  'yyyy-mm-dd');

dayRange = endDateNum - startDateNum;

secondsRange = SECONDS_PER_DAY*dayRange;

randomNumberOfSeconds = randi(secondsRange,NUMBER_RANDOM_TIMES,1);

randomDatenums = startDateNum + randomNumberOfSeconds/SECONDS_PER_DAY;

randomDates = datestr(randomDatenums);

[saharsahar]

Well, Thanks for your response,actually I am looking for generate random times between , lets say, 20:00:00 on 4/5/2013 and 05:00:00 on 5/5/2013. Actually I am not sure how I can address your algorithm in this issue?

Thanks for any help...

[the cyclist]

Change these lines:

START_DATE = '2013-04-05 20:00:00';
END_DATE   = '2013-05-05 05:00:00';

startDateNum = datenum(START_DATE,'yyyy-mm-dd HH:MM:SS');
endDateNum   = datenum(END_DATE,  'yyyy-mm-dd HH:MM:SS');