MATLAB not enough input arguments

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It is a function (not an script) and it needs some input arguments to run (in this case A and x), so you cannot hit the run button and expect it to run.

The first way:

Instead you can use the command windows in MATLAB and enter the command:

A = rand(3,3); % define A here
x = ones(3,1); % define x here
test(A,x) % then run the function with its arguments

remember that A and x should be defined properly.

The second way is:

Also you can hit the little triangle besides the green run button (see the figure below), and it will show you another option, type command to run. And
there you can directly enter the same command test(A,x). After that, each time you just hit enter for this function and it runs this command instead of only the test command without any argument.

enter image description here

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