k = polyder(p)k = polyder(a,b)[q,d] = polyder(b,a)
k = polyder(p), where p is a vector whose elements are the coefficients of a polynomial in descending powers, returns the derivative of that polynomial. k is a vector containing the coefficients of the derivative in descending powers.
k = polyder(a,b) returns the derivative of the product of the polynomials a and b.
[q,d] = polyder(b,a) returns the derivative of the polynomial quotient b/a, where the derivative is represented by q/d.
is obtained with
This result represents the polynomiala = [3 6 9];b = [1 2 0];k = polyder(a,b)k =12 36 42 18
(c) Copyright 1994 by The MathWorks, Inc.