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Matlab

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PARTH PATTNI

BIOENGINEERING-­‐MATLAB ASSIGNEMENT

a) figure subplot(2,1,1) plot(ecg_emg) ylabel('Voltage,V/mV') xlabel('Time,t/ms') title('ECG which is contaminated with EMG signals from the diaphragm') axis([0 3000 -1 2]) subplot(2,1,2) plot(ecg50hz) xlabel('Time,t/ms') ylabel('Voltage,V/mV') title('ECG containing mains contamination') axis([0 3000 -1 2])

PARTH PATTNI

BIOENGINEERING-­‐MATLAB ASSIGNEMENT

b & c) figure subplot(2,1,1) length=5; for x=1:3000-length+1; zecg_emg(x)=(ecg_emg(x)+ecg_emg(x+1)+ecg_emg(x+2)+ecg_emg(x+3)+ ecg_emg(x+4))/5; end plot(ecg_emg) ylabel('Voltage,V/mV') xlabel('Time,t/ms') title('ECG which is contaminated with EMG signals from the diaphragm') axis([0 3000 -1 2]) subplot(2,1,2) length=5; for x=1:3000-length+1; zecg50hz(x)=(ecg50hz(x)+ecg50hz(x+1)+ecg50hz(x+2)+ecg50hz(x+3)+ecg 50hz(x+4))/5; end plot(ecg50hz) xlabel('Time,t/ms') ylabel('Voltage,V/mV') title('ECG containing mains contamination')

PARTH PATTNI

BIOENGINEERING-­‐MATLAB ASSIGNEMENT

axis([0 3000 -1 2])

d) figure subplot(2,1,1) length=3; for x=1:3000-length+1; zecg_emg(x)=(ecg_emg(x)+ecg_emg(x+1)+ecg_emg(x+2))/3; end plot(zecg_emg) ylabel('Voltage,V/mV') xlabel('Time,t/ms') title('ECG which is contaminated with EMG signals from the diaphragm')

PARTH PATTNI

BIOENGINEERING-­‐MATLAB ASSIGNEMENT

axis([0 3000 -1 2]) subplot(2,1,2) length=3; for x=1:3000-length+1; zecg50hz(x)=(ecg50hz(x)+ecg50hz(x+1)+ecg50hz(x+2))/3; end plot(zecg50hz) xlabel('Time,t/ms') ylabel('Voltage,V/mV') title('ECG containing mains contamination') axis([0 3000 -1 2])

PARTH PATTNI

BIOENGINEERING-­‐MATLAB ASSIGNEMENT

figure subplot(2,1,1) length=10; for x=1:3000-length+1; zecg_emg(x)=(ecg_emg(x)+ecg_emg(x+1)+ecg_emg(x+2)+ecg_emg(x+3)+ ecg_emg(x+4)+ecg_emg(x+5)+ecg_emg(x+6)+ecg_emg(x+7)+ecg_emg(x+
8)+ecg_emg(x+9))/10;
end plot(zecg_emg) ylabel('Voltage,V/mV') xlabel('Time,t/ms') title('ECG which is contaminated with EMG signals from the diaphragm') axis([0 3000 -1 2]) subplot(2,1,2) length=10; for x=1:3000-length+1; zecg50hz(x)=(ecg50hz(x)+ecg50hz(x+1)+ecg50hz(x+2)+ecg50hz(x+3)+ecg 50hz(x+4)+ecg50hz(x+5)+ecg50hz(x+6)+ecg50hz(x+7)+ecg50hz(x+8)+ecg
50hz(x+9))/10;
end plot(zecg50hz) xlabel('Time,t/ms')

PARTH PATTNI

BIOENGINEERING-­‐MATLAB ASSIGNEMENT

ylabel('Voltage,V/mV') title('ECG containing mains contamination') axis([0 3000 -1 2])

e) function [a]=Parth_Pattni_function(B,L)
% Where B:- The array input.
% Where L:- The filter length. n=length(B); % 'n' is the length of the array 'B'. a=zeros(n-L+1,1); for i=1:1:(n-L+1); for j=i:1:(i+L-1)

PARTH PATTNI

BIOENGINEERING-­‐MATLAB ASSIGNEMENT

a(i)=a(i)+B(j); end a(i)=a(i)/L; end end

f) function [output]=threshold_function(input,threshold) for x=1:length(input) if input(x)>threshold output(x)=x; end end end

g) plot(ecg_emg) M = ecg_emg; for i= 1 : 10000; if M (i) > 1.4; i end end B=reshape(ecg_emg(1:9711),1079,9);

PARTH PATTNI

BIOENGINEERING-­‐MATLAB ASSIGNEMENT

for z=1:1079;
G(z)=mean(B(z,:));
plot (G) end figure plot (G) ylabel('Voltage,V/mV') xlabel('Time,t/ms') title('Averaged ECG which is contaminated with EMG signals from the diaphragm') e) plot(ecg50hz) PARTH PATTNI

M = ecg50hz; for i= 1 : 10000; if M (i) > 1.4; i end end B=reshape(ecg50hz(1:9711),1079,9); for z=1:1079;
G(z)=mean(B(z,:));
plot (G) end figure plot (G) ylabel('Voltage,V/mV') xlabel('Time,t/ms')

BIOENGINEERING-­‐MATLAB ASSIGNEMENT

PARTH PATTNI

BIOENGINEERING-­‐MATLAB ASSIGNEMENT

title('Averaged ECG containing Mains Contamination’)

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