check if the content of a columne of a structure has changed in matlab

If you want to check if a specific field of a structure has changed, you can compare the old and new value of that field using the isequal function. Here's an example:

main.m
old_struct = struct('field1', 5, 'field2', 'hello');
new_struct = struct('field1', 6, 'field2', 'hello');

if ~isequal(old_struct.field1, new_struct.field1)
    disp('field1 has changed');
end
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In this example, the code checks if the value of field1 has changed between the old_struct and new_struct. If it has changed, then it displays a message.

Note that if the field doesn't exist in the structure, isequal will return false. If you want to make sure the field exists, you can use the isfield function.