Mark Dickinson <dicki...@gmail.com> added the comment:
When you do: FINUB = np.empty(len(close)) FINLB = np.empty(len(close)) you're creating two *uninitialised* arrays of values. (See the NumPy documentation at https://numpy.org/doc/stable/reference/generated/numpy.empty.html.) When you then do FINUB[i] = UB[i] if UB[i] < FINUB[i-1] \ and close[i-1] > FINUB[i] else FINUB[i-1] on the first iteration of the loop (i = 1), you make use of the (undefined) value in FINUB[0] to compute FINUB[1]. In other words, this is a bug in your code, rather than in Python or NumPy. ---------- nosy: +mark.dickinson resolution: -> not a bug stage: -> resolved status: open -> closed _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue46199> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com