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ECG FILTERING using adaptivefilter

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rizwan12

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when i run this code there is an error of index of element to remove exceeds matrix dimension.anyhelp is highly appreciated

Code:
load x  %%%% load ecg signal%%%%%%
plot(x)
a=x./100
figure
plot(a)
refer=randn(1,length(a)) %%%% refrence noise signal %%%%%%
b=10.*refer
c=a+b';  %%%% corrupted signal %%%%%%
plot(c)
mu=0.005
ha=adaptfilt.lms(32,mu)
[y,e]=filter(ha,b',a)
 
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