MATLAB: Hello, i have a raw ECG text file. how can i plot this? any help? response will be appreciated.

.txt file ecgecg plot

here is the attached text file.

Best Answer

Try this:

data = importdata('106_5.txt')
x = data(:, 1);
y = data(:, 2);
plot(x, y, 'b-', 'LineWidth', 2);
title('ECG Signal', 'FontSize', 20);
xlabel('Time', 'FontSize', 20);
ylabel('Voltage', 'FontSize', 20);
grid on;
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0, 0.04, 1, 0.96]);

Related Solutions

MATLAB: I’m plotting ECG data and I want to resale the x and y axis so that only the first 3 seconds are showing

First, you need to know the sampling frequency of your EKG record. You can either have that stated in the metadata of the record, or from the time vector. If you have the sampling frequency (here ‘Fs’) you can calculate the time vector as:

t = linspace(0, 1, length(ecg50hz))/Fs;

then after your plot call, add:

set(gca, 'XLim',[0  3])

If my assumptions are correct, that will give you the result you want.

NOTE — Since I don’t have your data, this is UNTESTED CODE. It should work.

MATLAB: How to plot each local maxima of the ECG data

Remove the

hold off

in the outer loop and remove the replotting of the entire dataset in each sement processing step - change to:

plot(Time(originalIndex),Amp(originalIndex),'r*')

The code is now

% Read data.
ECG = csvread('ECG.csv');
f_s = 350;
frame_duration = 0.5;
frame_len = frame_duration*f_s;
N = length(ECG);
num_frames = floor(N/frame_len);
Time = (0:length(ECG)-1)/f_s; %Number of samples divided by frequency
Amp = ECG(:,1); %ECG Amplitude
plot(Time, Amp, 'b-', 'LineWidth', 2);
xlabel('Time', 'FontSize', 20);
ylabel('ECG', 'FontSize', 20);
hold on
threshold = 100;
line(xlim, [threshold, threshold], 'Color', 'r', 'LineWidth', 2);
grid on;
for m = 1:num_frames
	index1 = (m-1)*frame_len + 1;
	index2 = frame_len*m;
	frame = Amp(index1 : index2);
	fprintf('Extracted frame #%d, from index %d to %d.\n', ...
		m, index1, index2);
	
	[max_val, indexAtMax] = max(frame);
	originalIndex = indexAtMax + index1 - 1;
	fprintf('  Max of %f occurs at index %d of cropped signal, or %d of original signal.\n', ...
	max_val, indexAtMax, originalIndex);
	if (max_val > threshold)
        
		plot(Time(originalIndex),Amp(originalIndex),'r*')
		hold on
		line(xlim, [threshold, threshold], 'Color', 'r', 'LineWidth', 2);
		xlabel('Time', 'FontSize', 20);
		ylabel('ECG', 'FontSize', 20);
		grid on;
		hFig.WindowState = 'maximized'; % Maximize the window
        hold on
	end
	% hold off
end

Best Answer

Related Solutions

MATLAB: I’m plotting ECG data and I want to resale the x and y axis so that only the first 3 seconds are showing

MATLAB: How to plot each local maxima of the ECG data

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