numpy.log2 — NumPy v1.9 Manual - SciPy.org
https://docs.scipy.org/doc//numpy-1.9.0/reference/generated/numpy.log2.html
WEBExamples. >>> x = np.array([0, 1, 2, 2**4]) >>> np.log2(x) array([-Inf, 0., 1., 4.]) >>> xi = np.array([0+1.j, 1, 2+0.j, 4.j]) >>> np.log2(xi) array([ 0.+2.26618007j, 0.+0.j , 1.+0.j , …
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