MATLAB: Creating a vector of datetimes with increments of 15 minutes

Question

Hi all, currently trying to create a datetime vector with the form of 'yyyy-mm-dd HH:mm:ss' ranging from 2020-06-30 23:45:00 to 2015-01-01 00:00:00

in other words, elements should read as follows:

element 1 = 2020-06-30 23:45:00

element 2 = 2020-06-30 23:30:00

and so on.

I've tried converting to datenum for serial numbers and thought I could figure out the increment for 15 minutes and build from the first serialized number to the last such that timevec = t1:step:t_final with step = datenum(t1-t2) type of logic… didn't work out in my favor though.

Any suggestions?

Answer 1

Try this:

Timestamp = (datetime('2020-06-30 23:45:00') : -minutes(15) : datetime('2015-01-01 00:00:00')).';
Timestamp.Format = 'yyyy-MM-dd HH:mm:ss';

producing:

First5_Last5 = [Timestamp(1:5); Timestamp(end-4:end)]

First5_Last5 = 
  10×1 datetime array
   2020-06-30 23:45:00
   2020-06-30 23:30:00
   2020-06-30 23:15:00
   2020-06-30 23:00:00
   2020-06-30 22:45:00
   2015-01-01 01:00:00
   2015-01-01 00:45:00
   2015-01-01 00:30:00
   2015-01-01 00:15:00
   2015-01-01 00:00:00

.