Mathematics

Polynomial Evaluation

The polyval function evaluates a polynomial at a specified value. To evaluate p at s = 5, use

• polyval(p,5)
  
  ans =
     110
  

It is also possible to evaluate a polynomial in a matrix sense. In this case becomes , where X is a square matrix and I is the identity matrix. For example, create a square matrix X and evaluate the polynomial p at X.

• X = [2 4 5; -1 0 3; 7 1 5];
  Y = polyvalm(p,X)
  
  Y =
     377   179   439
     111    81   136
     490   253   639
  

Characteristic Polynomials

Convolution and Deconvolution