MATLAB: Express datetime from now, every 3h

datetimeevery 3hexpress

code is

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t = datetime('now','TimeZone','local','Format','y-MMM-d HH');

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In command,

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t = 2016-Oct-31 00

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But I want to express in command

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t_1 = 2016-Oct-30 00

t_2 = 2016-Oct-30 03

t_3 = 2016-Oct-30 06

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every 3 hour

please help me

Best Answer

In addition to Walter's suggestions, it may also be possible to take advantage of the roll-over behavior of the datetime constructor:

>> datetime(2016,11,1,(0:3:36)',0,0)
ans = 
  13×1 datetime array
   01-Nov-2016 00:00:00
   01-Nov-2016 03:00:00
   01-Nov-2016 06:00:00
   01-Nov-2016 09:00:00
   01-Nov-2016 12:00:00
   01-Nov-2016 15:00:00
   01-Nov-2016 18:00:00
   01-Nov-2016 21:00:00
   02-Nov-2016 00:00:00
   02-Nov-2016 03:00:00
   02-Nov-2016 06:00:00
   02-Nov-2016 09:00:00
   02-Nov-2016 12:00:00

Related Solutions

MATLAB: Sort Cell array by data

See if this does what you want:

Final = {'08/08/2006 18:00:00  0.57368      15.2205'
         '15/12/1999 12:00:00  1.94849      15.3231'
         '23/11/2013 09:00:00  1.33748      15.3277'
         '24/01/2007 12:00:00  1.59253      15.4576'
         '15/02/2005 12:00:00  1.16488      15.4618'
         '21/05/2012 00:00:00  0.55439      15.5536'
         '25/11/2010 06:00:00  0.78733      15.5557'
         '21/03/2007 06:00:00  1.24811      15.5585'
         '25/11/2008 18:00:00  1.20435      15.5773'
         '19/05/1999 03:00:00  0.63412      15.6291'};
dn = cellfun(@(x) datenum(x(1:19), 'dd/mm/yyyy HH:MM'), Final);
[dns,ix] = sort(dn);
FinalSorted = Final(ix);
FinalSorted = 
      '19/05/1999 03:00:00  0.63412      15.6291'
      '15/12/1999 12:00:00  1.94849      15.3231'
      '15/02/2005 12:00:00  1.16488      15.4618'
      '08/08/2006 18:00:00  0.57368      15.2205'
      '24/01/2007 12:00:00  1.59253      15.4576'
      '21/03/2007 06:00:00  1.24811      15.5585'
      '25/11/2008 18:00:00  1.20435      15.5773'
      '25/11/2010 06:00:00  0.78733      15.5557'
      '21/05/2012 00:00:00  0.55439      15.5536'
      '23/11/2013 09:00:00  1.33748      15.3277'

MATLAB: How to get correct dates for seasonal sst data (JJAS) using datenum function

Unless you are using a fairly old (< R2014b) version of MATLAB, don't use datenums. Use datetimes:

>> datetime({'01-Jun-1980 00:00:00' '29-Aug-1980 09:36:00'})
ans = 
  1×2 datetime array
   01-Jun-1980 00:00:00   29-Aug-1980 09:36:00

Best Answer

Related Solutions

MATLAB: Sort Cell array by data

MATLAB: How to get correct dates for seasonal sst data (JJAS) using datenum function

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