find onest and end of wave ?
3 次查看(过去 30 天)
显示 更早的评论
hello
how i can find the onest (the beginning) and the end of wave if i have the peaks only?
2 个评论
KSSV
2021-11-17
Show us how your data is. Pictorial example with your expectations will help us to help you.
回答(1 个)
Bjorn Gustavsson
2021-11-17
You cannot in a strict sense. You will have to settle for the first and last wave-crest, or set some arbitrary threshold for the wave-amplitude (10% of the peak, of the peak-to-peak, whatever). That this is impossible follows from the fact that functions like f(x-vt) solves the wave-equation - we can for example set f to be some sequence of Gaussian pulses moving to the right, and since a Gaussian has infinite support where it starts or ends becomes a question of where you set your threshold.
In practice if you have some natural noise-level in your measurements this might give you some sensible reason to select a threshold.
HTH
4 个评论
另请参阅
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!