What are signal metrics?
Signals relate to the general presence of a behavior that is desirable. Metrics are quantifiable, numeric outputs with regards to the desired behavior. Google often uses the HEART method, which breaks down the process of creating metrics.
How do you know if two signals are correlated?
In words, we compute a correlation by multiplying two signals together and then summing the product. The result is a single number that indicates the similarity between the signals x[n] and y[n]. What values can C(x, y) take on, and what does this tell us about the signals x[n] and y[n]?