Mathematics

Polynomial Derivatives

The polyder function computes the derivative of any polynomial. To obtain the derivative of the polynomial p = [1 0 -2 -5],

• q = polyder(p)
  
  q =
       3     0    -2
  

polyder also computes the derivative of the product or quotient of two polynomials. For example, create two polynomials a and b.

• a = [1 3 5];
  b = [2 4 6];
  

Calculate the derivative of the product a*b by calling polyder with a single output argument.

• c = polyder(a,b)
  
  c =
       8    30    56    38
  

Calculate the derivative of the quotient a/b by calling polyder with two output arguments.

• [q,d] = polyder(a,b)
  
  q =
      -2    -8    -2
  
  d =
       4    16    40    48    36
  

q/d is the result of the operation.

Convolution and Deconvolution

Polynomial Curve Fitting