How to convert from matlab time to reall time and date

Question

Rebecca Ellis 2018-11-26

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/432006-how-to-convert-from-matlab-time-to-reall-time-and-date

回答： Peter Perkins 2018-11-27

采纳的回答： Stephan

advplot.PNG

在 MATLAB Online 中打开

I have

datestr(7.3684e+05)
ans =
    '25-May-2017'
    
    

But I need the time and seconds aswell, How do I get this ?

whith this information - I am trying to combine this with [x y]=ginput, as I want to take the times off a graph.

I have tried using

datetick('x', 'dd/mm - HH:MM', 'keepticks', 'keeplimits'); and datetick('x')

Any advise would be appreciated as I am not following the help pages for this problem

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Answer 1

Stephan 2018-11-26

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https://ww2.mathworks.cn/matlabcentral/answers/432006-how-to-convert-from-matlab-time-to-reall-time-and-date#answer_348956

编辑：Stephan 2018-11-26

datestr(7.3684e+05,'dd-mmmm-yyyy HH:MM:SS')
ans =
    '25-May-2017 00:00:00' 

or with some content in it:

>> datestr(7.3684e+05+13.42,'dd-mmmm-yyyy HH:MM:SS')
ans =
    '07-June-2017 10:04:48'

Best regards

Stephan

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Rebecca Ellis 2018-11-26

在 MATLAB Online 中打开

I am getting :

'15-Oct-4034 01:40:08'
'15-Oct-4034 13:40:38'
'15-Oct-4034 01:59:33'
'15-Oct-4034 13:47:54'

But they should be all 23rd/24th of may 2017

When I follow:

% t1 = datetime('23-May-2017 09:15:00');
%change format to :
  t1 = datetime('2017-05-23 09:15:00');
% Get 5 Points
[x,y] = ginput(4);
% Calculate the picked dates with time
date_x = x(:)+t1;

Rebecca Ellis 2018-11-26

time = datestr(x)

time =

4×20 char array

'23-May-2017 16:25:08'

'24-May-2017 04:25:38'

'23-May-2017 16:44:33'

'24-May-2017 04:32:54'

And it seemed to have worked, thank you for helping me get to here. much appreciated.

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Answer 2

Peter Perkins 2018-11-27

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/432006-how-to-convert-from-matlab-time-to-reall-time-and-date#answer_349213

Rebecca, your description is not clear enough to understand what you are trying to do, but unless you are using a fairly old version of MATLAB, you should try to stay away from the old datenum/datestr functions and use datetime instead.