To add two datetime arrays , with millisecond values

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Srey
Srey 2021-11-7
评论： Srey 2021-11-8
I have a datetime array a=[ 09:39:12.000, 09:39:12.000] and another datetime array with b= [ 0:00:00.001, 0:00:00.002]
I want answer as [09:39:12.001, 09:39:12.002]. FIrst value of a added to first value of b, and so on.
It is showing 'Addition is not defined between datetime arrays'. Is there any way to add the hh:mm:ss of first array to .SSS of second array
Is there any way to add the 2 datetime arrays? Please help.

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采纳的回答

Stephen23
Stephen23 2021-11-7
编辑：Stephen23 2021-11-7
Ran in:
You should be storing those times as duration objects (not as datetime objects) so you could simply add them. The solution to your task is to convert them to duration objects, which can be simply added together:
a = datetime(0,0,0,[9;9],[39;39],[12;12],'Format','HH:mm:ss.SSS') % better as DURATION
a = 2×1 datetime array
09:39:12.000 09:39:12.000
b = datetime(0,0,0,0,0,[0.001;0.002],'Format','HH:mm:ss.SSS') % better as DURATION
b = 2×1 datetime array
00:00:00.001 00:00:00.002
c = timeofday(a)+timeofday(b);
c.Format = 'hh:mm:ss.SSS'
c = 2×1 duration array
09:39:12.001 09:39:12.002

更多回答（1 个）

Steven Lord
Steven Lord 2021-11-7
Ran in:
You cannot add two datetime arrays as the error message indicates. If addition of datetime arrays was defined, what would be the value of (tomorrow + next Tuesday)?
You can add two duration arrays (as Stephen shows) or a duration and a datetime.
x = minutes(45);
y = minutes(30);
n = datetime('now')
n = datetime
07-Nov-2021 21:34:58
z = x+y % 75 minutes
z = duration
75 min
w = n + y % half an hour from now
w = datetime
07-Nov-2021 22:04:58

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