Is it possible to overwrite any of these variables:pi, eps, inf, i ? If so, how can it be undone?
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Those are not variables, but functions.
which pi
which eps
You can mask any function with another function or a local variable. Of course this is a bad habit and many questions on this very site have arisen because people say, "MATLAB is broken, the MAX function doesn't work!" Here's what they did:
max = 0:5;
max(max) % Oops, this will not find the largest element anymore!
To undo the mask, simply clear the variable. If you have made a function in the local directory with the same name as a MATLAB function, you will have to delete it to undo the masking.
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