POLYDER Polynomial Coefficient Differentiation

Section: Optimization and Curve Fitting

Usage

The polyder function returns the polynomial coefficients resulting from differentiation of polynomial p. The syntax for its use is either 
 pder = polyder(p)

for the derivitave of polynomial p, or 

 convp1p2der = polyder(p1,p2)

for the derivitave of polynomial conv(p1,p2), or still 

 [nder,dder] = polyder(n,d)

for the derivative of polynomial n/d (nder is the numerator and dder is the denominator). In all cases the polynomial coefficients are assumed to be in decreasing degree. Contributed by Paulo Xavier Candeias under GPL

Example

Here are some examples of the use of polyder 
--> polyder([2,3,4])

ans = 
 4 3 


--> polyder([2,3,4],7)

ans = 
 28 21 


--> [n,d] = polyder([2,3,4],5)
n = 
 -20 -15 

d = 
 25