On Thu, Nov 29, 2012 at 7:42 PM, Neil Toronto <neil.toro...@gmail.com> wrote: > On 11/29/2012 10:53 AM, Greg Graham wrote:
>> Now, the unanswered question is why do Crystal Reports and Excel round >> 4.225 to 4.23? I don't think I'll find as helpful of a forum to answer that >> question as I have found for Racket. Thanks again for being such a great >> community! > > Aw, you buttered us up so nicely that I have to respond. They're probably > rounding twice: once to get a decimal number close to the original, and then > to the specified number of digits. Looks like that's it. This paper by William Kahan contains a nice example of the problems of excel rounding: http://www.cs.berkeley.edu/~wkahan/Mindless.pdf (the paper is long, the excel example is on page 3) P. ____________________ Racket Users list: http://lists.racket-lang.org/users
