function day is not working in matlab 2020a

2020 12 21
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更新时间：2020 12 21
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I got the following error while using the function 'day' in matlab 2020a. But its worked in 2016a
>>t =
7.3652e+05
>> day(t)
Check for missing argument or incorrect argument data type in call to function 'day'.

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Ameer Hamza
Ameer Hamza 2020-12-21

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Function day() is defined for datetime input arguments. For example
>> t = datetime('now');
>> day(t)
ans =
21

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Prasanth R
Prasanth R 2020-12-21
Thanks for your time. I have time values as double (100x1 double matrix). How can I extract day number from each value? I tried this way but the day numbers are totally changed.
(here tt is my matrix)
tint = int64(tt);
tdate = datetime(tint,'ConvertFrom','yyyymmdd') ;
day_count = day(tdate,'dayofmonth') ;
Ameer Hamza
Ameer Hamza 2020-12-21
What is the format of date stored in 'tt'? What does the number represent?
Prasanth R
Prasanth R 2020-12-21
Issue solved. I removed the line
tint = int64(tt);
and used 'datenum' in datetime function
(tt= my matrix)
tdate = datetime(tt,'ConvertFrom','datenum') ;
day_count = day(tdate,'dayofmonth') ;
Thanks for your valuable time and consideration...
Ameer Hamza
Ameer Hamza 2020-12-21
I am glad to be of help!!!

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