numpy.cov(m, y=None, rowvar=True, bias=False, ddof=None, fweights=None, aweights=None(m, y=None, rowvar=True, bias=False, d
numpy.cov(m, y=None, rowvar=True, bias=False, ddof=None, fweights=None, aweights=None(m, y=None, rowvar=True, bias=False, d