MATLAB: Save data to .txt file

Question

How do I save data to a txt file? I want to create a simple two column text file, where the first column is the data from an nx1 matrix and the second column is a different n x 1 matrix. I also want column headings in the first row of each column.

thanks

Answer 1

To write a text file with columns of data that have variable names, use the “writetable” function. First, create the data to write, put it in a table with variable names, and then write the data to text file.

% Create two columns of data
A  = rand(10,1);
B = rand(10,1);
% Create a table with the data and variable names
T = table(A, B, 'VariableNames', { 'A', 'B'} )
% Write data to text file
writetable(T, 'MyFile.txt')

For more information see:

https://www.mathworks.com/help/matlab/ref/writetable.html

Starting in R2019a, you can use "writematrix" to write a matrix to a file.

For example:

M=magic(5);
writematrix(M, "M.txt");

For more information on "writematrix", please refer to the following documentation:

https://www.mathworks.com/help/releases/R2019a/matlab/ref/writematrix.html