Signal Toolkit - filternorm

Function File: L = filternorm (b, a)

Function File: L = filternorm (b, a, pnorm)

Function File: L = filternorm (b, a, 2, tol)

Compute the 2-norm of a digital filter defined by the numerator coefficients, b, and the denominator coefficients, a. It is also possible to compute the infinity-norm by passing inf in the pnorm parameter. pnorm only accepts 2 or inf.

Example:

 [b, a] = butter (8, 0.5);
 filternorm (b, a)