add 1st & 4th column data, subtract 2& 3 column data from .txt file in matlab

To add the data from the first and fourth column and subtract the data from the second and third column in a .txt file using MATLAB, you can follow these steps:

1. Load the .txt file using the importdata function:

main.m
data = importdata('your_file.txt');
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2. Extract the columns of interest from the loaded data:

main.m
col1 = data(:, 1);
col2 = data(:, 2);
col3 = data(:, 3);
col4 = data(:, 4);
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3. Perform the addition and subtraction operations:

main.m
addition_result = col1 + col4;
subtraction_result = col2 - col3;
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4. You can then save the results back to a .txt file if desired:

main.m
result = [addition_result, subtraction_result];
dlmwrite('result.txt', result, 'delimiter', '\t');
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Make sure to replace 'your_file.txt' with the path to your actual .txt file and 'result.txt' with the desired output file name.

Note: This assumes that the .txt file contains numeric data separated by tabs or spaces. If the separator is different, you will need to specify it in the importdata function or modify the code accordingly.