How to separate time series data?

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Paul
Paul 2023-3-2
回答： Star Strider 2023-3-2
For context, I have 15 seconds worth of data although I only want to analyse the data from 12 seconds to 15 seconds. How do i seperate the final 3 seconds from my time series data?
TIA :)

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回答（1 个）

Star Strider
Star Strider 2023-3-2
Ran in:
It depends how they are formatted.
Assuming the times are a datetime array —
t = datetime(1,1,1) + seconds(0:0.5:15).';
s = randn(size(t));
T1 = table(t,s) % Data Table
T1 = 31×2 table
t s ____________________ _________ 01-Jan-0001 00:00:00 -0.10358 01-Jan-0001 00:00:00 -0.73795 01-Jan-0001 00:00:01 -0.046795 01-Jan-0001 00:00:01 0.0031687 01-Jan-0001 00:00:02 -0.73363 01-Jan-0001 00:00:02 1.5337 01-Jan-0001 00:00:03 1.3429 01-Jan-0001 00:00:03 -0.22569 01-Jan-0001 00:00:04 -0.35433 01-Jan-0001 00:00:04 -0.72689 01-Jan-0001 00:00:05 -2.0043 01-Jan-0001 00:00:05 0.51185 01-Jan-0001 00:00:06 -0.26662 01-Jan-0001 00:00:06 0.76956 01-Jan-0001 00:00:07 1.9912 01-Jan-0001 00:00:07 0.31162
Lv = second(T1{:,1}) >= 12; % Logical Vector
T1e = T1(Lv,:) % Result
T1e = 7×2 table
t s ____________________ _______ 01-Jan-0001 00:00:12 0.2435 01-Jan-0001 00:00:12 0.65176 01-Jan-0001 00:00:13 0.37124 01-Jan-0001 00:00:13 1.0221 01-Jan-0001 00:00:14 -1.8486 01-Jan-0001 00:00:14 -0.5345 01-Jan-0001 00:00:15 0.18867
.

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