How can I know the Difference between two signals??

2013 12 10
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更新时间：2013 12 10
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Dear Sir,
If I have two different signals, how can I calculate the difference between them (the difference should be one number)???
Thank you very much

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Wayne King
Wayne King 2013-12-10
That very much depends on what you are trying to measure/characterize. I think you need to be more specific.
Mohamed Elwakdy
Mohamed Elwakdy 2013-12-10
Dear Sir,
I am looking to know the difference between ship's trajectory and the coefficients that extract by using the polynomial function. How can I know the difference between them??

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Azzi Abdelmalek
Azzi Abdelmalek 2013-12-10
编辑：Azzi Abdelmalek 2013-12-10

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d=y1-y2
d is also a signal with the same size as y1 and y2. If you have another definition of a difference, post it.
Maybe you want
mean(y1-y2)

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