How to preallocate datatime array in Matlab?

Question

I would like to compute long datetime array in Matlab and hence wishing to preallocate it. Unfortunately when I am using NaT , I am loosing time component:

>> [datetime(1441411200,'ConvertFrom','posixtime'), datetime(1441411500,'ConvertFrom','posixtime')]
ans = 
  1×2 datetime array
   05-Sep-2015 00:00:00   05-Sep-2015 00:05:00

>> A=NaT(2,1)
A = 
  2×1 datetime array
   NaT
   NaT

>> A(1)=datetime(1441411200,'ConvertFrom','posixtime'); A(2)=datetime(1441411500,'ConvertFrom','posixtime');
>> A
A = 
  2×1 datetime array
   05-Sep-2015
   05-Sep-2015

How to accomplish?

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Matlab version is 2016b

Answer 1

The only problem here is in the Format property of the array created by NaT - it gets a different default value. So, you could do:

A = NaT(2, 1);
A.Format = 'dd-MMM-uuuu HH:mm:ss';
A(1) = datetime()

which results in

A = 
  2×1 datetime array
   30-Apr-2018 10:34:47
   NaT