I understand that you're working with ECG data from the ADS1298ECGFE-PDK device and trying to convert it to MATLAB format while assigning the appropriate channels to specific ECG leads.
I assume that the data samples are provided in form of text file (.TXT format). Another assumption is that mapping for the ECG leads to the channels in your setup. The ‘save’ function can be used to save variable from workspace to file
The MATLAB script below script organizes the data into a structured format (ecgData) with fields for each ECG lead.
% Read the data from the text file as strings
opts = delimitedTextImportOptions('NumVariables', 8, 'Delimiter',' ', 'DataLines', 12);
rawData = readmatrix('RawData.txt', opts);
% Function to convert the string format to two numbers
function [num1, num2] = convertToNumbers(str)
parts = strsplit(str, ',');
num1 = str2double(parts{1});
num2 = str2double(parts{2});
end
% Convert the cell array to a numeric array
voltageData = zeros(size(rawData, 1), size(rawData, 2) * 2);
for i = 1:size(rawData, 1)
for j = 1:size(rawData, 2)
[num1, num2] = convertToNumbers(rawData{i,j});
voltageData(i, j*2-1) = num1;
voltageData(i, j*2) = num2;
end
end
% Create a structure to hold the ECG data
ecgData = struct();
% Assign channels to leads based on our assumed mapping
ecgData.leadI = voltageData(:, 1:2);
ecgData.leadII = voltageData(:, 3:4);
ecgData.leadIII = voltageData(:, 5:6);
ecgData.leadAVR = voltageData(:, 7:8);
ecgData.leadAVL = voltageData(:, 9:10);
ecgData.leadAVF = voltageData(:, 11:12);
ecgData.leadV1 = voltageData(:, 13:14);
ecgData.leadV2 = voltageData(:, 15:16);
% Save the data as a .mat file
save('ecg_data.mat', 'ecgData');
To know more on the ‘save’ function, please refer to the following documentation:
