This example shows how to compare datetime and duration arrays. You can perform an element-by-element comparison of values in two datetime arrays or two duration arrays using relational operators, such as > and <.
Compare two datetime arrays. The arrays must be the same size or one can be a scalar.
A = datetime(2013,07,26) + calyears(0:2:6)
A = 1x4 datetime
26-Jul-2013 26-Jul-2015 26-Jul-2017 26-Jul-2019
B = datetime(2014,06,01)
B = datetime
01-Jun-2014
A < B
ans = 1x4 logical array
1 0 0 0
The < operator returns logical 1 (true) where a datetime in A occurs before a datetime in B.
Compare a datetime array to text representing a date.
A >= '26-Sep-2014'ans = 1x4 logical array
0 1 1 1
Comparisons of datetime arrays account for the time zone information of each array.
Compare September 1, 2014 at 4:00 p.m. in Los Angeles with 5:00 p.m. on the same day in New York.
A = datetime(2014,09,01,16,0,0,'TimeZone','America/Los_Angeles',... 'Format','dd-MMM-yyyy HH:mm:ss Z')
A = datetime
01-Sep-2014 16:00:00 -0700
B = datetime(2014,09,01,17,0,0,'TimeZone','America/New_York',... 'Format','dd-MMM-yyyy HH:mm:ss Z')
B = datetime
01-Sep-2014 17:00:00 -0400
A < B
ans = logical
0
4:00 p.m. in Los Angeles occurs after 5:00 p.m. on the same day in New York.
Compare two duration arrays.
A = duration([2,30,30;3,15,0])
A = 2x1 duration
02:30:30
03:15:00
B = duration([2,40,0;2,50,0])
B = 2x1 duration
02:40:00
02:50:00
A >= B
ans = 2x1 logical array
0
1
Compare a duration array to a numeric array. Elements in the numeric array are treated as a number of fixed-length (24-hour) days.
A < [1; 1/24]
ans = 2x1 logical array
1
0
Use the isbetween function to determine whether values in a datetime array lie within a closed interval.
Define endpoints of an interval.
tlower = datetime(2014,08,01)
tlower = datetime
01-Aug-2014
tupper = datetime(2014,09,01)
tupper = datetime
01-Sep-2014
Create a datetime array and determine whether the values lie within the interval bounded by t1 and t2.
A = datetime(2014,08,21) + calweeks(0:2)
A = 1x3 datetime
21-Aug-2014 28-Aug-2014 04-Sep-2014
tf = isbetween(A,tlower,tupper)
tf = 1x3 logical array
1 1 0