Appendix F: Miscellaneous

f￿x i￿

f￿x i-1￿

f￿x i+1￿

nx nx

x i

x n

Figure F￿4: Equation Differentiation

The values at the first and last points are obtained not from the center deviation, but from the following equations:

First point

f￿(x1) [

n{±3f (x1) ) 4f (x2)±f (x3)}

2

 

 

 

Last point

f￿(xn) [

n{f (xn±2)±4f (xn±1) ) 3f (xn)}

2

 

 

 

F￿4

AWG2021 User Manual