On Thu, Jan 6, 2011 at 04:14, <josef.p...@gmail.com> wrote: > just something I bumped into and wasn't aware of > >>>> aa > array([ 1., 1., 1., 1., 1.]) >>>> aa.astype(int) > array([0, 1, 0, 0, 0]) >>>> aa - 1 > array([ -2.22044605e-16, 2.22044605e-16, -2.22044605e-16, > -3.33066907e-16, -3.33066907e-16]) >>>> np.round(aa).astype(int) > array([1, 1, 1, 1, 1])
This is behavior inherited from C and matches Python's behavior. int(aa[0]) == 0. Similarly, inside the C code, (int)(1.0 - 2.22e-16) == 0. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
