Datetime to string format issue

Hi

I have a datetime array as shown below.

timearray_segmenta = 

  struct with fields:

    start: [2022-09-06T00:00:00    2022-09-16T00:00:00    2022-09-26T00:00:00    2022-10-06T00:00:00    2022-10-16T00:00:00    2022-10-26T00:00:00    …    ]
     stop: [2022-09-15T23:59:59    2022-09-25T23:59:59    2022-10-05T23:59:59    2022-10-15T23:59:59    2022-10-25T23:59:59    2022-11-04T23:59:59    …    ]

The formate of the date time has to be as shown above, this was achived using:

     timearray.Format = 'yyyy-MM-dd''T''HH:mm:ss';

I need to convert this datetime structure as a string, so i am using the following:

     K>> datestr(timearray_segmenta.start)

ans =

  7×11 char array

    '06-Sep-2022'
    '16-Sep-2022'
    '26-Sep-2022'
    '06-Oct-2022'
    '16-Oct-2022'
    '26-Oct-2022'
    '05-Nov-2022'

The formate changes, if i was to reassign the formate i get the following:

    datestr(timearray_segmenta.start,timearray.Format )

ans =

  7×21 char array

    '2022-00-06'T'00:09:00'
    '2022-00-16'T'00:09:00'
    '2022-00-26'T'00:09:00'
    '2022-00-06'T'00:10:00'
    '2022-00-16'T'00:10:00'
    '2022-00-26'T'00:10:00'
    '2022-00-05'T'00:11:00'

What needs to change in my code?

[Stephen23]

"What needs to change in my code?"

Get rid of deprecated and superfluous DATESTR. Just set the DATETIME format:

https://www.mathworks.com/help/matlab/ref/datetime.html#d124e322956

Answer 1

[Steven Lord]

Don't use datestr. As its documentation page states, it is not recommended. Use string or char instead.

dt = datetime('now');
dt.Format = 'yyyy-MM-dd''T''HH:mm:ss'

dt = datetime
   2022-11-19T13:28:00

s = string(dt)

s = "2022-11-19T13:28:00"

Answer 2

[dpb]

>> datetime(start,'InputFormat','yyyy-MM-dd''T''HH:mm:ss')
ans = 
  datetime
   06-Sep-2022
>> datetime(start,'InputFormat','yyyy-MM-dd''T''HH:mm:ss','Format','yyyy-MM-dd''T''HH:mm:ss')
ans = 
  datetime
   2022-09-06T00:00:00
>> string(ans)
ans = 
    "2022-09-06T00:00:00"
>> 

Answer 3

[Dharmesh Joshi]

Thanks

String(), seems to have worked perfectly?