On Sun, 18 Dec 2005 08:37:40 +0000, Bengt Richter wrote: > On Sun, 18 Dec 2005 10:27:16 +1100, Steven D'Aprano <[EMAIL PROTECTED]> wrote: > >>On Sat, 17 Dec 2005 09:26:39 +0000, Bengt Richter wrote: >> >> >>> I wonder if this won't work (for IEEE 754 double that is) > ^^^^^^^^^^^^^^^^^^^[1]
Ah! I read that, and blanked it out of my mind :-( > I wonder if frexp is always available, I believe so, since it is part of the math module. [snip] > I'm a little curious what you are using this for. Mostly curiosity -- I'm fascinated by numeric programming, but haven't got the time to really sit down and learn it properly. But periodically I find time to dabble for a few hours. At a more practical level, for many numeric algorithms it is useful to know the machine accuracy (which of course varies over the range of floats). The machine accuracy at float x is nextfloat(x) - x. That gives you an idea of how far apart floats are -- differences smaller than that number are impossible for the algorithm to resolve. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
