duration.floor
duration: Y = floor (D)
duration: Y = floor (D, unit)
Round toward negative infinity for duration arrays.
Y = floor (D) rounds each element of the duration
array D to the largest integer number of seconds not greater than
that element.
Y = floor (D, unit) rounds each element of the
duration array D to the largest integer number of the specified
unit of time not greater than that element. unit must be one of
the following values:
'seconds' (default)
'minutes'
'hours'
'days'
'years'
Source Code: duration
floor rounds a duration down to a whole unit (default: seconds).
d = hours (2.9)
d = duration 2.9 hr
floor (d, 'hours')
ans = duration 2 hr