Convert date and time to vector of components
DateVector = datevec(t)t to a date
vector—that is, a numeric vector whose six elements represent the
year, month, day, hour, minute, and second components of
t.
If t is a datetime or duration array having
m elements, then datevec returns an
m-by-6 matrix where each row corresponds to a value in
t.
If t is a datetime array, then its values represent
points in time. Each row of DateVector represents a
specific date and time.
If t is a duration array, then its values represent
elapsed time. Each row of DateVector represents a
length of time measured in fixed-length time units. For this reason, the
values in the second column of DateVector
(representing number of months) are always zeros. For more information,
see the Limitations.
While you can represent dates and times as date vectors, it is
recommended that you use datetime values to
represent points in time, and duration or calendarDuration values
to represent elapsed times.
DateVector = datevec(DateNumber)datevec function returns an m-by-6
matrix containing m date vectors, where m
is the total number of date numbers in DateNumber.
DateVector = datevec(DateString)formatIn.
Syntaxes without formatIn are significantly slower than
syntaxes that include it.
DateVector = datevec(DateString,formatIn)formatIn to interpret the dates and times
represented by DateString.
DateVector = datevec(DateString,PivotYear)PivotYear to interpret text that specifies the year as
two characters. If the format used in the text is known, specify the format as
formatIn. Syntaxes without formatIn
are significantly slower than syntaxes that include it.
DateVector = datevec(DateString,formatIn,PivotYear)formatIn to
interpret the dates and times represented by DateString,
and PivotYear to interpret text that specifies
the year as two characters. You can specify formatIn and PivotYear in
either order.
[Y,M,D,H,MN,S] = datevec(___)Y,
M, D, H,
MN, and S (year, month, day, hour,
minutes, and seconds). The datevec function returns
milliseconds as a fractional part of the seconds (S)
output.
If the first input argument is a datetime array, a numeric array, or text
representing dates and times, then datevec sets any month
values less than 1 to 1 in the output. Day values, D, less
than 1 are set to the last day of the previous month minus
|D|. However, if 0 ≤ DateNumber < 1,
then datevec(DateNumber) returns a date vector of the form
[0 0 0 H MN S], where H,
MN, and S are hours, minutes, and
seconds, respectively.
If the first input argument is a duration array, then the output of
datevec does not represent points in time, but rather
lengths of time measured in fixed-length time units. Each row represents a
duration as the number of years, months, days, hours, minutes, and seconds whose
sum is the total length of time represented by the input duration.
However, a month cannot be a fixed-length time unit because different months
have different numbers of days. Therefore the number of months is always zero.
Instead, datevec represents a duration as the number of
years (each 365.2425 days long), the number of days (each 86,400 seconds long),
and the number of hours, minutes, and seconds whose sum is that duration. As
another consequence, the number of days can be greater than 31.
The vectorized calling syntax can offer significant performance improvement for large arrays.