复件 dynamic.m

关于采样数据得频谱分析MATLAB事例程序

fs=300;%设定采样频率
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];
len=length(x);
%a=[1.0000   -2.9581    2.9171   -0.9590];
%b=[(1.0e-005) *0.1125    (1.0e-005) *0.3374    (1.0e-005) *0.3374    (1.0e-005) *0.1125];

[b,a]=butter(1,2.2/150);

%
n1=0:len-1;
t=n1/fs;

y0=filter(b,a,x);
z1=fft(x,len);%进行fft变换
z2=fft(y0,len);
f=(0:length(z1)-1)'*fs/length(z1);%进行对应的频率转换
mag1=abs(z1);%求幅值
mag2=abs(z2);

n=100;
m=n:len;