Quote:
Originally posted by wildmatrixII
Applying this to our signal the average will be a positive value > 0 since there is no negative area.
Now you really got a point here. There is for sure no negative area. That's why what I wrote was a quite clumpsy way to describe what I meant. Of course, to be able to use this model, you must allow the "area" to be negative. Since you are supposed to multiply the average y by the delta x, the sign of your "area" element will depend on the sign of the current y value. Hope this cleared things out.