www.gusucode.com > signal 案例源码程序 matlab代码 > signal/FilterNormsExample.m
%% Filter Norms % Compute the 2-norm of a Butterworth IIR filter with tolerance $10^{-10}$. % Specify a normalized cutoff frequency of $0.5\pi$ rad/s and a filter % order of 5. % Copyright 2015 The MathWorks, Inc. %% [b,a] = butter(5,0.5); L2 = filternorm(b,a,2,1e-10) %% % Compute the infinity-norm of an FIR Hilbert transformer of order 30 and % normalized transition width $0.2\pi$ rad/s. b = firpm(30,[.1 .9],[1 1],'Hilbert'); Linf = filternorm(b,1,inf)