How can I know the Difference between two signals??

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

[Wayne King]

That very much depends on what you are trying to measure/characterize. I think you need to be more specific.

[Mohamed Elwakdy]

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??

Answer 1

[Azzi Abdelmalek]

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)