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Time messed up after import from xls

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In an excel file, I have a column of time data as
12:00:00 AM
12:00:01 AM
12:00:02 AM
12:00:03 AM
12:00:04 AM
12:00:05 AM
when I import this column to Matlab, the data look like:
0
1.15740740740741e-05
2.31481481481481e-05
3.47222222222222e-05
4.62962962962963e-05
5.78703703703704e-05
and when i use the datastr to convert, the results look like this:
00:01:00
00:01:01
00:01:02
00:01:03
00:01:04
00:01:05
Where does the additional 1 minute come from?? I suspect it's about the accuracy of the numbers. Not sure though.
Please help. Thanks!

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Accepted Answer

Azzi Abdelmalek
Azzi Abdelmalek on 15 Aug 2013
d=[0
1.15740740740741e-05
2.31481481481481e-05
3.47222222222222e-05
4.62962962962963e-05
5.78703703703704e-05]
datestr(d,'HH:MM:SS')

  1 Comment

Shi Shu
Shi Shu on 15 Aug 2013
Thanks, Azzi. I think this helped me out. Please try this code and you will see something interesting. I didn't expect the case of the letters can make this different.
d=[0;
1.15740740740741e-05;
2.31481481481481e-05;
3.47222222222222e-05;
4.62962962962963e-05;
5.78703703703704e-05];
datestr(d,'hh:mm:ss')

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More Answers (1)

Jan
Jan on 15 Aug 2013
Excel stores date as serial date numbers, which are not identical to Matlab's serial date format. See http://www.mathworks.com/matlabcentral/answers/64198#answer_75809 for an answer.

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