k that the original signal is reconstructed exactly (to numerical precision). Test is performed on a random signal with harmonic coefficients uniformly sampled from (-1,1), once for a real and once for a complex signal. This test is run for multiple values of L and outputs the results in CSV format (to stdout). If no value for N is given in the arguments, each test will run with N = L, otherwise all tests will be run with the given N (and tests with L &lt; N will be skipped). L will take all powers of 2 les