2008/6/12 David Cournapeau <david at ar.media.kyoto-u.ac.jp>: > Lorenzo Isella wrote: >> but I do not know the command to identify a number vs an Inf or a nan >> (my fictitious is_a_number condition). >> > > What about numpy.isnan and numpy.isfinite ? In fact np.isfinite(NaN) is False, so it's easy: A = A[np.isfinite(A)] Anne