h = hour(t) returns the hour
component for each date and time specified in t.
The h output is a double array and
contains integer values from 0 to 23. To assign values to the hour component of
values in t, use t.Hour and modify the
Hour property.
Input date and time, specified as a datetime
array.
To support existing code that previously required Financial Toolbox™, hour also accepts serial date numbers
and text as inputs, but they are not recommended. For more information, see
Version
History.
Although hour supports serial date number and text inputs,
datetime values are recommended instead. The
datetime data type provides flexible date and time formats,
storage out to nanosecond precision, and properties to account for time zones and
daylight saving time.
To convert serial date numbers or text to datetime values, use
the datetime function. For
example:
t = datetime(738427.656845093,"ConvertFrom","datenum");
h = hour(t)
h =
15
There are no plans to remove support for serial date number or text inputs.
In previous releases, there were two hour functions: one in
MATLAB® that accepted datetime values, and one in
Financial Toolbox that accepted serial date numbers or text values. As of R2022a, you
can call hour without Financial Toolbox. When you call hour from MATLAB, it accepts all previous input types.
For example, you can make these calls with a serial date number and text from
MATLAB:
h = hour(738427.656845093)
h =
15
h = hour("2021/09/28 15:45:51.4160")
h =
15
In addition, hour accepts a second input for the date format
when the first input is not a datetime array:
h = hour(t,F)
In this syntax, specify F using a valid date format as
documented for the datestr function, though
'Q' format specifiers are not supported. For example:
h = hour("2021/09/28 15:45:51.4160","yyyy/dd/mm hh:MM:ss.fff")
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