Re: routine for angles needed

From	James Kuyper <jameskuyper@verizon.net>
Newsgroups	comp.lang.c
Subject	Re: routine for angles needed
Date	2015-09-06 11:57 -0400
Organization	Self
Message-ID	<55EC6281.4010500@verizon.net> (permalink)
References	(8 earlier) <mpr00v$1hn$1@speranza.aioe.org> <7oa3sapt6r9q23hicbp2tpafqg3rjl98do@4ax.com> <kfnr3mcww4j.fsf@x-alumni2.alumni.caltech.edu> <lntwr8v48u.fsf@kst-u.example.com> <msgj3f$apd$1@speranza.aioe.org>

Show all headers | View raw

On 09/06/2015 01:31 AM, glen herrmannsfeldt wrote:
> Keith Thompson <kst-u@mib.org> wrote:
>> Tim Rentsch <txr@alumni.caltech.edu> writes:
>>> Robert Wessel <robertwessel2@yahoo.com> writes:
>> [...]
>>>> Ultimately any sort of decimal encoding has to be less efficient 
>>>> than binary encoding, since you invariably end up with "invalid" bit
>>>> patterns. [snip]
> 
>>> This isn't right.  Using a decimal base for floating point
>>> is not inherently less bit efficient than a binary base.
>>> Using a decimal base can be much less convenient than
>>> using a binary base, but it is not inherently less bit
>>> efficient.  In particular there needn't be any invalid
>>> or duplicate bit patterns.
> 
> Bit efficient is a funny term in this context. You can represent
> a specific number of real values with a given number of bits.

Bit efficiency compares the number of real values representable by the
format under discussion, with 2^N, where N is the number of bits
required to store the format. If the first number is substantially
smaller than the second, the bits are being used inefficiently. This
seems a reasonable use of the term.

Thread

routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 10:17 -0700
  Re: routine for angles needed Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-02 10:38 -0700
    Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 11:10 -0700
      Re: routine for angles needed Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-02 11:26 -0700
        Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 11:41 -0700
          Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 12:02 -0700
  Re: routine for angles needed Bartc <bc@freeuk.com> - 2015-08-02 18:41 +0100
    Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 11:43 -0700
      Re: routine for angles needed Bartc <bc@freeuk.com> - 2015-08-02 20:00 +0100
        Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 12:04 -0700
          Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 12:10 -0700
            Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 12:24 -0700
              Re: routine for angles needed Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-02 12:32 -0700
                Re: routine for angles needed Bartc <bc@freeuk.com> - 2015-08-02 20:40 +0100
                Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 12:59 -0700
                Re: routine for angles needed Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-02 13:14 -0700
                Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 13:39 -0700
                Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 13:45 -0700
                Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-03 07:48 -0700
                Re: routine for angles needed Bartc <bc@freeuk.com> - 2015-08-03 17:06 +0100
                Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-03 09:09 -0700
                Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-03 09:17 -0700
                Re: routine for angles needed Bartc <bc@freeuk.com> - 2015-08-03 17:48 +0100
                Re: routine for angles needed Keith Thompson <kst-u@mib.org> - 2015-08-03 13:44 -0700
                Re: routine for angles needed Bartc <bc@freeuk.com> - 2015-08-03 23:51 +0100
                Re: routine for angles needed Keith Thompson <kst-u@mib.org> - 2015-08-03 18:30 -0700
                Re: routine for angles needed glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-08-03 23:11 +0000
                Re: routine for angles needed Bartc <bc@freeuk.com> - 2015-08-04 01:32 +0100
                Re: routine for angles needed glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-08-04 01:14 +0000
                Re: routine for angles needed Robert Wessel <robertwessel2@yahoo.com> - 2015-08-03 20:26 -0500
                Re: routine for angles needed glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-08-04 18:24 +0000
                Re: routine for angles needed Robert Wessel <robertwessel2@yahoo.com> - 2015-08-05 01:46 -0500
                Re: routine for angles needed glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-08-05 18:06 +0000
                Re: routine for angles needed Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-05 11:37 -0700
                Re: routine for angles needed Keith Thompson <kst-u@mib.org> - 2015-09-05 16:24 -0700
                Re: routine for angles needed Richard Damon <Richard@Damon-Family.org> - 2015-09-05 21:01 -0400
                Re: routine for angles needed Robert Wessel <robertwessel2@yahoo.com> - 2015-09-05 23:30 -0500
                Re: routine for angles needed glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-09-06 05:37 +0000
                Re: routine for angles needed Robert Wessel <robertwessel2@yahoo.com> - 2015-09-07 00:27 -0500
                Re: routine for angles needed glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-09-06 05:31 +0000
                Re: routine for angles needed James Kuyper <jameskuyper@verizon.net> - 2015-09-06 11:57 -0400
                Re: routine for angles needed Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-09-06 17:44 +0100
                Re: routine for angles needed James Kuyper <jameskuyper@verizon.net> - 2015-09-06 14:02 -0400
                Re: routine for angles needed Robert Wessel <robertwessel2@yahoo.com> - 2015-09-07 00:31 -0500
                Re: routine for angles needed Keith Thompson <kst-u@mib.org> - 2015-09-06 11:59 -0700
                Re: routine for angles needed Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-06 18:04 -0700
                Re: routine for angles needed Keith Thompson <kst-u@mib.org> - 2015-09-06 18:30 -0700
                Re: routine for angles needed Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-09-06 18:48 -0700
                Re: routine for angles needed Robert Wessel <robertwessel2@yahoo.com> - 2015-09-07 00:44 -0500
                Re: routine for angles needed Robert Wessel <robertwessel2@yahoo.com> - 2015-08-03 20:16 -0500
                Re: routine for angles needed glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-08-04 01:26 +0000
                Re: routine for angles needed Robert Wessel <robertwessel2@yahoo.com> - 2015-08-05 02:05 -0500
                Re: routine for angles needed Keith Thompson <kst-u@mib.org> - 2015-08-03 18:33 -0700
                Re: routine for angles needed glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-08-04 21:24 +0000
                Re: routine for angles needed Robert Wessel <robertwessel2@yahoo.com> - 2015-08-03 19:41 -0500
                Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 12:51 -0700
                Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 12:56 -0700
                Re: routine for angles needed Bartc <bc@freeuk.com> - 2015-08-02 20:57 +0100
                Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 13:06 -0700
                Re: routine for angles needed Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-08-02 22:25 +0100
                Re: routine for angles needed Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-08-02 22:27 +0100
                Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-02 14:40 -0700
  Re: routine for angles needed "Chris M. Thomasson" <nospam@nospam.nospam> - 2015-08-02 19:08 -0700
    Re: routine for angles needed fir <profesor.fir@gmail.com> - 2015-08-03 02:18 -0700
  Re: routine for angles needed danncorbit@gmail.com - 2015-08-12 02:18 -0700
  Re: routine for angles needed bartekltg <bartekltg@gmail.com> - 2015-09-07 05:02 +0200

csiph-web