% error: [x, t] = impz(b [, a, n, fs]) % % Generate impulse-response characteristics of the filter. The filter % coefficients correspond to the the z-plane rational function with % numerator b and denominator a. If a is not specified, it defaults to % 1. If n is not specified, or specified as [], it will be chosen such % that the signal has a chance to die down to -120dB, or to not explode % beyond 120dB, or to show five periods if there is no significant % damping. If no return arguments are requested, plot the results. % % See also: freqz, zplane