Hi,
I have a 3x1 table, with one variable, timestamp:
timestamp
2021-02-01 09:00:00
2021-02-01 09:01:00
2021-02-01 09:02:00
How can I parse this to create a 3x2 table, with two variables, date and time:
date time
2021-02-01 09:00:00
2021-02-01 09:01:00
2021-02-01 09:02:00
Any help would be appreciated!
IP

2 Comments

Stephen23
Stephen23 on 17 Nov 2022
Edited: Stephen23 on 17 Nov 2022
Note that changing the FORMAT does not changes the actual date/time values stored in the DATETIME object, it only changes how the DATETIME object looks when displayed or converted to text.
If you actually want to have the data consist only of the date and time values separately, then use DATESHIFT and TIMEOFDAY.
Thank you for your help, Stephen! I really appreciate it!
Inna

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 Accepted Answer

Try something like this —
T1 = table(datetime(['2021-02-01 09:00:00'
'2021-02-01 09:01:00'
'2021-02-01 09:02:00']), 'VariableNames',{'timestamp'})
T1 = 3×1 table
timestamp ____________________ 01-Feb-2021 09:00:00 01-Feb-2021 09:01:00 01-Feb-2021 09:02:00
date = T1.timestamp;
time = T1.timestamp;
date.Format = 'yyyy-MM-dd';
time.Format = 'HH:mm:ss';
T1 = addvars(T1,date,time);
T1 = removevars(T1,'timestamp')
T1 = 3×2 table
date time __________ ________ 2021-02-01 09:00:00 2021-02-01 09:01:00 2021-02-01 09:02:00
There may also be other ways to do this.
EDIT — (17 Nov 2022 at 13:16)
I was not certain what you wanted.
Try this —
T1 = table(datetime(['2021-02-01 09:00:00'
'2021-02-01 09:01:00'
'2021-02-01 09:02:00']), 'VariableNames',{'timestamp'})
T1 = 3×1 table
timestamp ____________________ 01-Feb-2021 09:00:00 01-Feb-2021 09:01:00 01-Feb-2021 09:02:00
[y,m,d] = ymd(T1.timestamp); % Year, Month, Day Only
date = datetime([y,m,d]); % Convert Back To 'datetime'
time = timeofday(T1.timestamp); % Time Of Day Only
T1 = addvars(T1,date,time);
T1 = removevars(T1,'timestamp')
T1 = 3×2 table
date time ___________ ________ 01-Feb-2021 09:00:00 01-Feb-2021 09:01:00 01-Feb-2021 09:02:00
.

4 Comments

Thank you!
As always, my pleasure!
Also, instead of using timeofday, the hms function is an option, with the syntax being essentially the same as with ymd.
Many thanks!
As always, my pleasure!

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