Charles R Harris wrote: > > > On 10/11/06, *Greg Willden* <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > Hi All, > > I've read discussions in the archives about how round() "rounds to > even" and how that is supposedly better. > > But what I haven't been able to find is "What do I use if I want > the regular old round that you learn in school?" > > > Perhaps you could explain *why* you want the schoolbook round? Given > that floating point is inherently inaccurate you would have to expect > to produce a lot of numbers exactly of the form x.5 *without errors*, > which means you probably don't need round to deal with it. Anyway, > absent a flag somewhere, you can do something like (x + > sign(x)*.5).astype(int). > > Chuck Also, where did you go to school? In Fairfax County, VA in the 80's at least, they were teaching "round to even"; since that time, I've taught math in a variety of locations and settings and with a variety of texts, and where I have seen the issue addressed, it's always "round to even" (or, as I learned it, "the rule of fives").
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