— Function File: [r, p, f, m] = residuez (B, A)

Compute the partial fraction expansion of filter H(z) = B(z)/A(z).

INPUTS: B and A are vectors specifying the digital filter H(z) = B(z)/A(z). Say help filter for documentation of the B and A filter coefficients.

RETURNED:

• r = column vector containing the filter-pole residues
  
• p = column vector containing the filter poles
  
• f = row vector containing the FIR part, if any
  
• m = column vector of pole multiplicities

EXAMPLES:

          Say test residuez verbose to see a number of examples.

For the theory of operation, see <http://ccrma.stanford.edu/~jos/filters/residuez.html>

See also: residue residued