Re: Another little puzzle

From	Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups	comp.programming
Subject	Re: Another little puzzle
Date	2023-01-10 23:36 -0800
Organization	A noiseless patient Spider
Message-ID	<86fschmsjf.fsf@linuxsc.com> (permalink)
References	(6 earlier) <878rioifnh.fsf@bsb.me.uk> <868rinskhk.fsf@linuxsc.com> <topmiu$4ps$1@gioia.aioe.org> <868ridni7g.fsf@linuxsc.com> <tpeqaf$vje$1@gioia.aioe.org>

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"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

> On 2023-01-08 16:45, Tim Rentsch wrote:
>
>> "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:
>>
>>> Averaging arcs is equivalent to averaging angles.
>>
>> Angles are a one-dimensional measure.
>
> Averaging arcs is still equivalent to averaging angles, which is
> trivial result of elementary trigonometry.
>
>> Finding an arc length
>> "average" of points on a sphere needs a two-dimensional result.
>
> Points do not have arcs.
>
>>>> Now that I think about it, finding the point that minimizes the
>>>> great circle distances squared would be at least computationally
>>>> unpleasant.
>>>
>>> See above, it is just angles to average.
>>
>> Apparently you have not yet understood the problem.
>
> Again, averages of arcs and angles are equivalent up to a
> multiplier.
>
>> Why don't
>> you try writing a program that inputs a set of points normalized
>> to be on the unit sphere, and then calculates the arc length
>> average point (on the unit sphere) of those input points?
>
> Why don't you write a formula specifying your need?
>
> Programs are written according to the specifications.  Numeric
> programs require a properly stated problem, rather than a bunch
> of words arbitrarily thrown in a meaningless sentence as above.

After reading this response and also three other responses of
yours (to Ben Bacarisse) down stream, I can't help but think you
have little or no interest in understanding the problem, offering
any useful comments about it, or trying to write a program to
solve the problem.  Apparently the only interest you do have is
making captious remarks.

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Re: Another little puzzle Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-12-30 01:00 +0000
  Re: Another little puzzle Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-12-29 23:25 -0800
    Re: Another little puzzle Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-12-30 14:04 +0000
      Re: Another little puzzle Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-12-31 00:24 +0000
        Re: Another little puzzle Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-12-31 06:42 -0800
          Re: Another little puzzle "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2022-12-31 17:04 +0100
            Re: Another little puzzle Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-01-01 01:24 +0000
            Re: Another little puzzle Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-01-08 07:45 -0800
              Re: Another little puzzle "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2023-01-08 17:17 +0100
                Re: Another little puzzle Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-01-08 20:41 +0000
                Re: Another little puzzle Richard Heathfield <rjh@cpax.org.uk> - 2023-01-08 21:14 +0000
                Re: Another little puzzle "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2023-01-08 22:31 +0100
                Re: Another little puzzle Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-01-09 03:25 +0000
                Re: Another little puzzle "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2023-01-09 11:22 +0100
                Re: Another little puzzle Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-01-09 20:37 +0000
                Re: Another little puzzle "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2023-01-10 09:06 +0100
                Re: Another little puzzle Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-01-11 02:41 +0000
                Re: Another little puzzle "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2023-01-11 10:01 +0100
                Re: Another little puzzle Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-01-12 01:00 +0000
                Re: Another little puzzle Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-01-10 23:36 -0800
                Re: Another little puzzle Y A <ya00000100000@yahoo.com> - 2023-01-11 02:39 -0800
          Re: Another little puzzle Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-01-01 01:10 +0000
            Re: Another little puzzle Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-01-08 07:17 -0800
              Re: Another little puzzle Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-01-08 19:43 +0000
                Re: Another little puzzle Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-01-08 19:59 +0000
                Re: Another little puzzle Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-01-10 23:25 -0800
      Re: Another little puzzle Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-12-31 06:20 -0800
        Re: Another little puzzle Augǝl <angel0000000001000000000000@mail.ee> - 2022-12-31 10:23 -0800

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