create a function that increments a global counter every time called in matlab

To increment a global counter every time a function is called in MATLAB, you can follow these steps:

1. Define a global variable in the main workspace.

main.m
global counter
counter = 0;
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2. In your function, declare the global variable using the global keyword.

main.m
function myFunction()
    global counter
    counter = counter + 1;
end
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3. Call the function multiple times to increment the global counter.

main.m
myFunction()
myFunction()
disp(counter) % Output: 2
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The global keyword allows the function to access the global variable counter and increment it every time the function is called.