Converting numeric elements to date

I have converted date to serial number:

A= 10-Jan-2000

D = datenum(A)

D = 730495

And after doing some operation, I want to change (D) it back to the date format. But could not.

Is there any function to convert serial number to date format?

Answer 1

[Steven Lord]

Depending what operations you need to perform, you may be able to keep your data as a datetime array without converting it to serial date numbers. But if you do, datetime can convert serial date numbers into a datetime array.

>> dt = datetime('now')
dt = 
  datetime
   30-Sep-2020 09:48:21

>> sdn = datenum(dt)
sdn =
   7.3806e+05

>> dt2 = datetime(sdn, 'ConvertFrom', 'datenum')
dt2 = 
  datetime
   30-Sep-2020 09:48:21   

As an example of some operations defined on datetime arrays, you can perform date and time arithmetic using datetime and duration arrays.

>> dt3 = dt + hours(1) + minutes(2) + seconds(3) % datetime + duration = datetime
dt3 = 
  datetime
   30-Sep-2020 10:50:24
   
>> du = dt3 - dt2 % datetime - datetime = duration
du = 
  duration
   01:02:03

[Milad Naderloo]

I apperciate, your suggestion works well

Answer 2

[Ameer Hamza]

Use datestr(): https://www.mathworks.com/help/matlab/ref/datestr.html. For example

A = '10-Jan-2000';
D = datenum(A);
D = D + 10;
B = datestr(D);

Result

>> B
B =
    '20-Jan-2000'

[Milad Naderloo]

Thank you so much!