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Re: Column slices

From Bartc <bc@freeuk.com>
Newsgroups comp.lang.c
Subject Re: Column slices
Date 2015-05-06 10:46 +0100
Organization A noiseless patient Spider
Message-ID <micnrf$mdk$1@dont-email.me> (permalink)
References <3f240d60-031e-4605-a07d-a9d20bed581b@googlegroups.com> <6dfd7905-9c07-4f0c-92fa-b3d988a55164@googlegroups.com> <3e43ec2b-e875-4da5-812d-1d8db80552a9@googlegroups.com>

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On 06/05/2015 10:33, luser droog wrote:
> On Wednesday, May 6, 2015 at 2:26:12 AM UTC-5, asetof...@gmail.com wrote:
>> Is weight[i] == dim[i]*sizeof(matrix element)?
>
> It's the product of all "lower" dimensions.
> weight[i] = product(dims[i+1 .. rank-1]
>
> So for dims = (3, 4, 5)
> weight = (20, 5, 1) = (4*5, 5, 1)
>
> or for dims = (7, 6, 5, 4, 3, 2)
> weight = (720, 120, 24, 6, 2, 1)
>

On 06/05/2015 10:30, Bartc wrote:
 > So for a 3x4x5 array it would be:
 > Presumably the W vector might be W0=12 W1=4 W2=1, to help locate

Or W0=20 as you demonstrate above. (The boxes in the diagram I created 
were too badly drawn to see properly what size they were!)

-- 
Bartc

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Column slices luser droog <luser.droog@gmail.com> - 2015-05-05 23:18 -0700
  Column slices asetofsymbols@gmail.com - 2015-05-06 00:26 -0700
    Re: Column slices luser droog <luser.droog@gmail.com> - 2015-05-06 02:33 -0700
      Re: Column slices Bartc <bc@freeuk.com> - 2015-05-06 10:46 +0100
      Re: Column slices asetofsymbols@gmail.com - 2015-05-07 11:02 -0700
        Re: Column slices asetofsymbols@gmail.com - 2015-05-07 14:05 -0700
  Re: Column slices Nobody <nobody@nowhere.invalid> - 2015-05-06 08:29 +0100
  Re: Column slices Bartc <bc@freeuk.com> - 2015-05-06 10:30 +0100
    Re: Column slices luser droog <luser.droog@gmail.com> - 2015-05-06 03:11 -0700
      Re: Column slices asetofsymbols@gmail.com - 2015-05-08 09:05 -0700
  Re: Column slices luser droog <luser.droog@gmail.com> - 2015-05-11 16:50 -0700
    Re: Column slices asetofsymbols@gmail.com - 2015-05-11 17:24 -0700
      Re: Column slices asetofsymbols@gmail.com - 2015-05-11 19:01 -0700
        Re: Column slices luser droog <luser.droog@gmail.com> - 2015-05-19 09:56 -0700
          Re: Column slices asetofsymbols@gmail.com - 2015-05-19 10:43 -0700
            Re: Column slices asetofsymbols@gmail.com - 2015-05-19 11:16 -0700
              Re: Column slices asetofsymbols@gmail.com - 2015-05-19 11:27 -0700
              Re: Column slices luser droog <luser.droog@gmail.com> - 2015-05-19 21:28 -0700
                Re: Column slices asetofsymbols@gmail.com - 2015-05-20 08:05 -0700
            Re: Column slices luser droog <luser.droog@gmail.com> - 2015-05-19 21:20 -0700
              Re: Column slices asetofsymbols@gmail.com - 2015-05-20 08:55 -0700
                Re: Column slices asetofsymbols@gmail.com - 2015-05-20 08:58 -0700
                Re: Column slices asetofsymbols@gmail.com - 2015-05-21 01:22 -0700
                Re: Column slices asetofsymbols@gmail.com - 2015-05-21 01:34 -0700
                Re: Column slices asetofsymbols@gmail.com - 2015-05-26 19:17 -0700
                Re: Column slices asetofsymbols@gmail.com - 2015-05-31 13:56 -0700
                Re: Column slices Keith Thompson <kst-u@mib.org> - 2015-05-31 14:23 -0700
                Re: Column slices Ian Collins <ian-news@hotmail.com> - 2015-06-01 09:37 +1200
                Re: Column slices asetofsymbols@gmail.com - 2015-06-01 01:23 -0700
                Re: Column slices Ian Collins <ian-news@hotmail.com> - 2015-06-01 20:35 +1200
                Re: Column slices mark.bluemel@gmail.com - 2015-06-01 03:50 -0700
                Re: Column slices luser droog <luser.droog@gmail.com> - 2015-06-01 18:04 -0700
                Re: Column slices luser droog <luser.droog@gmail.com> - 2015-06-01 18:16 -0700
                Re: Column slices "Chris M. Thomasson" <nospam@nospam.nospam> - 2015-06-01 19:57 -0700
                Re: Column slices Rosario19 <Ros@invalid.invalid> - 2015-06-02 08:30 +0200
                Re: Column slices luser droog <luser.droog@gmail.com> - 2015-06-02 00:22 -0700
    Re: Column slices Ike Naar <ike@iceland.freeshell.org> - 2015-05-12 06:06 +0000
      Re: Column slices Ike Naar <ike@iceland.freeshell.org> - 2015-05-12 21:15 +0000
    Re: Column slices asetofsymbols@gmail.com - 2015-05-13 20:49 -0700
      Re: Column slices luser droog <luser.droog@gmail.com> - 2015-05-13 23:43 -0700
        Re: Column slices luser droog <luser.droog@gmail.com> - 2015-05-13 23:44 -0700
        Re: Column slices asetofsymbols@gmail.com - 2015-05-14 01:02 -0700
          Re: Column slices asetofsymbols@gmail.com - 2015-05-15 23:06 -0700
            Re: Column slices asetofsymbols@gmail.com - 2015-05-16 03:46 -0700
  Re: Column slices luser droog <luser.droog@gmail.com> - 2015-05-23 00:17 -0700
    Re: Column slices asetofsymbols@gmail.com - 2015-05-23 07:59 -0700
      Re: Column slices asetofsymbols@gmail.com - 2015-05-23 21:25 -0700
        Re: Column slices luser droog <luser.droog@gmail.com> - 2015-05-24 18:29 -0700
      Re: Column slices luser droog <luser.droog@gmail.com> - 2015-05-24 18:08 -0700
        Re: Column slices asetofsymbols@gmail.com - 2015-05-25 00:13 -0700

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