phasepw.m

来自「里面囊括了基于matlab滤波器设计的各种.m文件」· M 代码 · 共 23 行

 
% PHASEPW(B,A,color)
%
% This function is used to plot the phase response of filter
% or signal. The Y-axis is phase (radians); X-axis is normalized
% freqency from 0 to 1. The color will be the one specified
% in argument. If there is no color specification, the color
% will be white. Also see PHPLOT


function F = phasepw(B,A,c)

 if nargin == 2
  c = 'w';
 end

 [F,W]=freqz(B,A,1000,'whole');
 W=linspace(0,1,1000);
 F = angle(F);
 plot(W,F,c)

 xlabel('Normalized Frequency');
 ylabel('Phase (Radians)');