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How can I find a multiplication coefficient between two signal?

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Lara
Lara 2023-3-31
评论： Lara 2023-3-31
Hello!! I have two signals measured experimentally. Theoritically, the second signal can be obtained with the first one by multiplying it with a constant ( this constant characterize my system). How can I find on matlab this constant. I tried "corr" but it doesn't work. Thank you so much for your help!!!

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John D'Errico
John D'Errico 2023-3-31
编辑：John D'Errico 2023-3-31
Your need is to solve the problem
signal2 = constant*signal1
Where the variable "constant" is unknown. This is easy to solve in MATLAB.
constant = signal1(:)\signal2(:);
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Lara
Lara 2023-3-31
Thank you for your answer.
Actually, the two signals are mesured experimentally and have noise and incertitude, that's why i can't do a simple ratio. But I did the root mean square error and it works.

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