timeseries date data matlab

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Sarah Yun 2019-12-10

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回答： dpb 2019-12-10

采纳的回答： dpb

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Hi,

I have a textfile for date (years from 1990 to 2015) and temp.

The dates in the date column are given in the following format:

Why are the dates written like this and how can I convert them to standard dates in terms of days, months and years (if applicable)?

Thanks

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Answer 1

dpb 2019-12-10

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Either however you created the text file and/or imported it, you ended up with the datenum integer portion of the date/time information (presuming there was time also originally). We'd have to know the rest of the process to be able to help regarding avoiding that.

But, given where you are, just convert the datenum to datetime via

>> t=[727168
727199
727230
727258
727289
727319
727350];
>> datetime(t,'ConvertFrom','datenum')
ans = 
  7×1 datetime array
   01-Dec-1990 00:00:00
   01-Jan-1991 00:00:00
   01-Feb-1991 00:00:00
   01-Mar-1991 00:00:00
   01-Apr-1991 00:00:00
   01-May-1991 00:00:00
   01-Jun-1991 00:00:00
>>