discrepancy in date conversion

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MatLab Code N
MatLab Code N 2020-11-20
评论： Peter Perkins 2020-11-20
Hi,
The DT=datenum(2017,5,13,0,0,0); in matlab gives: 736828
when i convert 736828 in excel to dattime it gives 5/13/3917 12:00:00 AM.
What is the reason behind such change in the year between matlab and excel conversion?
Thanks!

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采纳的回答

Urmila
Urmila 2020-11-20
Hi,
Looks like the date format in the excel sheet is different. You can Ctrl+1 to format the cells and select the format as shown in the screenshot.
However, a better solution would be to use datetime function, DT=datetime(2017,5,13,0,0,0); This will make the variable DT to be a datetime variable and you need not have to change the format manually.

更多回答（2 个）

Steven Lord
Steven Lord 2020-11-20
See the description of the dateType input that you can pass into datetime on the documentation page for datetime, specifically the description of the 'datenum' and 'excel' values. I second Urmila's suggestion to use datetime instead of serial date numbers returned by datenum. [The documentation page for datenum makes the same recommendation.]
  1 个评论
Peter Perkins
Peter Perkins 2020-11-20
Yes, to add to what Steve has said:
>> datetime(736828,'ConvertFrom','datenum')
ans =
datetime
13-May-2017
>> datetime(736828,'ConvertFrom','excel')
ans =
datetime
13-May-3917
Excel uses a completely different representation that the old MATLAB datenum format. And you should stay away from using datenum at all, and use the new and better datetime instead.

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MatLab Code N
MatLab Code N 2020-11-20
Thank you both for your explanations. Much aprreciated!

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