[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Scheme-reports] Padding/placeholders (hashes) in numerical syntax
| Date: Mon, 5 Sep 2011 18:57:16 +0200
| From: Peter Bex <Peter.Bex@x>
| On Sun, Sep 04, 2011 at 09:12:42PM -0400, Aubrey Jaffer wrote:
| > I believe that R5RS permits engineering-notation.
| Absolutely; I was wondering how it decides to print 3/4 as 750.0e-3
| considering 7.5e-1 is equally acceptable, as is 0.75 or 75e-2 or
| any other exponent prefixed by a suitably scaled number.
In engineering-notation the exponent is always an integer multiple of
3. SCM scales the matissa to be between 1 and 1000, and omits the
exponent when it is 0.
Engineering-notation is good for viewing floating-point numerical
data. Unless the data is very erratic, one can tell from looking at
the mantissas when the exponents have changed.
Scheme-reports mailing list