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Re: Q on SparseArray representation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg114078] Re: Q on SparseArray representation
  • From: Oliver Ruebenkoenig <ruebenko at wolfram.com>
  • Date: Tue, 23 Nov 2010 05:57:27 -0500 (EST)

On Sat, 20 Nov 2010, kj wrote:

> In <ic5oqu$73u$1 at smc.vnet.net> Oliver Ruebenkoenig <ruebenko at wolfram.com> writes:
>
>> {{0, 1, 3, 4, 8}, {{3}, {4}, {1}, {4}, {4}, {1}, {3}, {2}}}
>
>> The first row has 1-0 entries in column 3 (i.e. 8) The second row has 3-1
>> entries in columns 4 and 1 (i.e. 9 and 6), the next row, 3, has 4-3
>> entries in column 4, ie. 2 and so on...
>
>> What the 1 stands for, I can't remember.
>
>
> Cool.
>
> Mysteries remain (that leading 1!), but your explanation clarifies
> a lot.

It is the SparseArray version number. A colleague looked it up.

Oliver

>
> Thanks!
>
> ~kj
>
>


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