how to generate random time format data in MATLAB?

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saharsahar 2013-7-5

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https://ww2.mathworks.cn/matlabcentral/answers/81241-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

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Answer 1

the cyclist 2013-7-5

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https://ww2.mathworks.cn/matlabcentral/answers/81241-how-to-generate-random-time-format-data-in-matlab#answer_90947

在 MATLAB Online 中打开

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);

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saharsahar 2013-7-5

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 2013-7-5

在 MATLAB Online 中打开

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');