explain computation of P2(1:L/2+1)
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What exacly does P2(1:L/2+1) this
where L is length of signal and P2 is two sided spectrum
P1 = P2(1:L/2+1)
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Answers (1)
Omer Yasin Birey
on 5 Feb 2019
Edited: Omer Yasin Birey
on 5 Feb 2019
It takes one more element than half of it. Let's say your array is
P2 = [1 2 5 6 7 8 9];
L = length(P2);
P2(1:L/2+1)
the output of this will be
[1 2 5 6]
Because the length is 7 and (7/2+1) will be 4 (it is 4 because for odd numbers it will round down the result of dividing operation). And it will take until 4th element.
3 Comments
Omer Yasin Birey
on 5 Feb 2019
Hard to tell with a single line code. Also after his edit it still seems like he wants to know what syntax does
P Sun
on 10 Jun 2021
Well, I know neither and it is great to know the syntax part.
This line from intro of fft https://uk.mathworks.com/help/matlab/ref/fft.html
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