Need help with butterworth function
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I am trying to use the butterworth function and I can't seem to get it working. Here is my code:
clear,clc
load('DATA_01_TYPE01.mat')
A = sig;
x = A(2,1:1000)
t=1:1:1000;
subplot(3,1,1)
plot(t,x)
N=size(x,2);
noise=0.5*randn(1,N); %noise
[b a]=butter(2, [0.6 0.7]);
noise=filter(b,a,noise);
x_n=x+noise;
subplot(3,1,2)
plot(t,x_n)
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Star Strider
le 26 Oct 2018
Modifié(e) : Star Strider
le 26 Oct 2018
I assume ‘A’ or ‘x’ is the signal you want to filter. If so, you are not giving it to the filter function to use. You are only giving it your ‘noise’ vector, so that it what it is filtering.
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