On Mon, Apr 29, 2013 at 12:12 PM, Jordi Gutiérrez Hermoso <
jord...@octave.org> wrote:
> On 29 April 2013 14:50, Ed Meyer wrote:
> > I'm not proposing using anything but octave_idx_type for indexing or
> > changing the return type of numel() - I just question why numel() is
> > used for sparse ma
On 04/29/2013 03:12 PM, Jordi Gutiérrez Hermoso wrote:
On 29 April 2013 14:50, Ed Meyer wrote:
>I'm not proposing using anything but octave_idx_type for indexing or
>changing the return type of numel() - I just question why numel() is
>used for sparse matrices. It should be irrelevant for anyth
On 29 April 2013 14:50, Ed Meyer wrote:
> I'm not proposing using anything but octave_idx_type for indexing or
> changing the return type of numel() - I just question why numel() is
> used for sparse matrices. It should be irrelevant for anything but
> ccs2full().
The numel function is just one e
On Mon, Apr 29, 2013 at 11:07 AM, Jordi Gutiérrez Hermoso <
jord...@octave.org> wrote:
> On 29 April 2013 14:00, Jordi Gutiérrez Hermoso
> wrote:
> > And yes, sparse matrices can be indexed by a single index instead of
> > two, like any other matrix. Internally in Octave's source, the
> > assumpt
On 29 April 2013 14:00, Jordi Gutiérrez Hermoso wrote:
> And yes, sparse matrices can be indexed by a single index instead of
> two, like any other matrix. Internally in Octave's source, the
> assumption that a single index of octave_idx_type is available is used
> throughout.
The specific case w
On 29 April 2013 13:21, Ed Meyer wrote:
>
>
> On Mon, Apr 29, 2013 at 9:47 AM, Jordi Gutiérrez Hermoso
> wrote:
>>
>>
>> All matrices need to be linearly indexable, and of course, this is how
>> they are actually stored in memory, as a single long array indexed by
>> a single index. Thus, the tot
On Mon, Apr 29, 2013 at 9:47 AM, Jordi Gutiérrez Hermoso wrote:
>
> All matrices need to be linearly indexable, and of course, this is how
> they are actually stored in memory, as a single long array indexed by
> a single index. Thus, the total number of indexable elements of a
> matrix can't be
On 29 April 2013 12:40, Ed Meyer wrote:
>
>
> On Mon, Apr 29, 2013 at 6:10 AM, Jordi Gutiérrez Hermoso
> wrote:
>>
>> On 29 April 2013 06:25, Miroslaw Kwasniak
>> wrote:
>> > it's something wrong whith sparse matrices A(n,n) when n is a multiple
>> > of 65536=2^16.
>> >
>> > Demonstration code =
On Mon, Apr 29, 2013 at 6:10 AM, Jordi Gutiérrez Hermoso wrote:
> On 29 April 2013 06:25, Miroslaw Kwasniak
> wrote:
> > it's something wrong whith sparse matrices A(n,n) when n is a multiple
> > of 65536=2^16.
> >
> > Demonstration code ==
> >
> > for i=1:3;
On 29 April 2013 06:25, Miroslaw Kwasniak wrote:
> it's something wrong whith sparse matrices A(n,n) when n is a multiple
> of 65536=2^16.
>
> Demonstration code ==
>
> for i=1:3;
> for n=i*2^16+(-1:1);
> A=spdiags(ones(n,1),0,n,n);
> t=trace(A);
>
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