Assuming that the variable you want to insert from FT03419.mat to A003419.mat has the same name in both files, you can use the following Matlab code to loop through the files in folder A and B, match the files based on their names, and insert the variable from the corresponding file in folder B to the corresponding file in folder A:
folderA = 'path/to/folder/A/';
folderB = 'path/to/folder/B/';
variableName = 'name_of_variable_to_insert';
filesA = dir(fullfile(folderA, '*.mat'));
filesB = dir(fullfile(folderB, '*.mat'));
for i = 1:length(filesA)
filenameA = filesA(i).name;
filenameB = strrep(filenameA, 'A', 'FT');
filePathA = fullfile(folderA, filenameA);
filePathB = fullfile(folderB, filenameB);
% load the variable from the file in folder B
variable = load(filePathB, variableName);
variable = variable.(variableName);
% insert the variable into the file in folder A
save(filePathA, variableName, '-append');
end
This code uses the `dir` function to get a list of all the .mat files in each folder, and then loops through the files in folder A. For each file in folder A, it constructs the corresponding filename in folder B by replacing the 'A' with 'FT'. It then constructs the full file paths for both files using the `fullfile` function. Next, it loads the variable from the file in folder B using the `load` function and the name of the variable you want to insert. Finally, it inserts the variable into the file in folder A using the `save` function with the `-append` flag to add the variable to the existing .mat file.
Note that if the variable you want to insert has a different name in each file, you will need to modify this code to handle that case.
