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How to filter a signal..plz help me..

1 次查看（过去 30 天）
Tung
Tung 2013-4-11
关闭： MATLAB Answer Bot 2021-8-20
Hi all, I have a question and I need your help.. I make a file that:
%----------------------------------------------------------
fs = 100;
t = 0:1/fs:1;
x = sin(2*pi*t*3)+.25*sin(2*pi*t*40);
b = ones(1,10)/10; % 10 point averaging filter
y = filtfilt(b,1,x); % Noncausal filtering
yy = filter(b,1,x); % Normal filtering
plot(t,x,t,y,'--',t,yy,':')
%-----------------------------------------------------------
It will be Ok if "fs" is 100.When "fs" is 10000.It isn't smooth with "y" and "yy"...What do I have to do? Plz help me... thank all..
  1 个评论
Jan
Jan 2013-4-11
What do you have to do to achieve what?
You have examined the behaviour of two filter methods to two different signals and see a difference. But how could we suggest a change without knowing, what you want to change? Where is the problem?

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