APPENDIX A 

 EFFECTIVE WIDTH 



The effective width of a moving average smoothing function is defined 

 to be the width of square pulse required to have the same area and same 

 middle height. For example, consider the pulse: 



, W{X) 



This pulse has area 



-/.; 



w(x) dx 



and middle height w(0). The effective width would be the value of e.w. 

 such that 



(e.w. ) X w(0) = A 



(e.w.) = A/w(0) 



87 



