Create a numeric variable DATE+HOUR
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Hi. I hope you're ok.
I write this question because I want to create a new numeric variable which contains the date (i.e. 12/09/2019) and the hour (i.e. 01:15:20). I did this in Excel and the result is given in the following photo:
However, If I try to do this in MATLAB (R19b) the result is quite different.
Can you tell me if I'm doing something wrong? I don't know if the sintaxis of the date and hour are correct, and if not, what's wrong with that (I want the result given in my Excel sheet).
Thanks!
David
采纳的回答
There's rarely a good reason to use datenum rather than datetime values. See Why are datetime arrays better than datenum?
% Convert to datetime
Time = '01:15:02 12/09/19';
datetime(Time,'InputFormat','HH:mm:ss MM/dd/yy')
Date numbers in Excel represent the number of days since Jan 1 1900 whereas date numbers in Matlab represent the number of days since Jan 1,0000 so there's a 693960 day difference (see documentation).
4 个评论
David E.S.
2021-2-7
FYI if you were importing a date number from Microsoft Excel, rather than using the text representation of the date and time you could use datetime with the 'ConvertFrom' option.
n = 43720.05231
datetime(n, 'ConvertFrom', 'excel')
David E.S.
2021-2-7
Sure use either of the following syntaxes
Excel supports two date systems that start from 1900 or 1904 which is reason for the second argument.
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