i want to filter a frequeny
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mouh nyquist
il 6 Nov 2014
Commentato: mouh nyquist
il 4 Dic 2014
Hi all,
I write because I'm trying to do filtering in maltab.
in the code below I have a signal which is composed of two sinus of frequencies 0.3Hz and 2Hz.
I'd like to do is filter the sinus 2Hz the code below does not kidnapped this signal's component ...
you know where it comes from?
clear all;close all;clc;
%%original
t = 0:0.01:10;
y = sin(2*pi*0.3*t)+sin(2*pi*2*t);
%%filter
fs = 1000;
fcoupure = 2*[1 3]/fs;
[b]=fir1(1,fcoupure,'stop');
yfilter=filter(b,1,y);
figure (1);hold on;plot(t,y);plot(t,yfilter,'r');
%%butterworth
fs = 1000;
fcoupure = 2*[1 3]/fs;
[b,a]=butter(1,fcoupure,'stop');
yfilter=filter(b,a,y);
figure (2);hold on;plot(t,y);plot(t,yfilter,'r');
help me with any method not only butter
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Rick Rosson
il 7 Nov 2014
doc iirnotch
2 Commenti
Andrew Reibold
il 7 Nov 2014
Modificato: Andrew Reibold
il 7 Nov 2014
Did you read the doc? #doit4me
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