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{{about|the vector addressing type|the I/O method|Vectored I/O}}


'''Gather-scatter''' is a type of memory addressing that often arises when addressing
vectors in [[Sparse matrix|sparse]] [[linear algebra]] operations. It is the
vector-equivalent of register indirect addressing, with gather involving indexed
reads and scatter indexed writes. [[Vector processor]]s have
hardware support for gather-scatter operations, providing instructions such as
''Load Vector Indexed'' for gather and ''Store Vector Indexed'' for scatter.


==Definition==
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Denoting by <math>idx</math> the list of indices of sparse vector <math>x</math>,
the sparse gather of dense <math>y</math> into <math>x</math> denoted
<math>x \leftarrow y|_x</math>, assigns <math>x(i)=y(idx(i))</math>.<ref>[http://www.netlib.org/blas/blast-forum/chapter3.pdf BLAS Technical Forum standard, Chapter 3: Sparse BLAS.]</ref>
 
The sparse scatter, denoted <math>y|_x \leftarrow x</math> is the reverse operation.
It copies the nonzero values of sparse <math>x</math> into the corresponding
locations in the dense vector <math>y</math>, i.e. <math>y(idx(i))=x(i)</math>.
 
==Examples==
Gather:
<source lang="C">
for (i=0; i<N; ++i)
  x[i] = y[idx[i]];
</source>
 
Scatter:
<source lang="C">
for (i=0; i<N; ++i)
  y[idx[i]] = x[i];
</source>
 
== See also ==
* [[SIMD]]
* [[Vectorization (parallel computing)|Vectorization]]
 
==References==
{{reflist}}
 
[[Category:Parallel computing]]

Latest revision as of 20:28, 6 December 2014


Nobody ever got criticised for bringing in someone famous, who'd videos of himself or herself in her or his heyday - or, the clips might be of those under the speaker's or her tutelage in the event he is a trainer instead of a performer.
On the other hand, if you are looking at methods to produce teams http://tinyurl.com/pch83be and cause them to become much more powerful the next day than they were before the speaker stood up, them I think I will have to reply "no". Indeed, it would not matter if that was your goal, who the speaker is.

The only way for teams to make changes that are significant and sustainable to their behaviors that are working is in order for them to to discover the advancements for themselves. And as groups as well, rather than as a set of individuals. Loudspeakers talk as teams and never to an audience as people.
And also the act of speaking, however entertaining and no matter the level to which the crowd are encouraged to get concerned, is basically ugg boots sale a mainly passive and one way thing. Where the response can become "yes" is when the techniques http://tinyurl.com/pch83be are not just talked about, but really used with actual teams in a indiana team building environment.

ugg boots usa Team-building tasks are, as the next word in the description suggests, energetic, although Conference talking may be passive. And active, ugg boots sale in turn, means that the participants may take place as a team. They are given a chance to learn for themselves by that and that's something I am very much in favour of.
But how suitable is it to get some one from a totally different planet to give advice to a group of company-oriented members of personnel. Will they get anything useful from it at work to them, although they may love it and get a buzz out of meeting someone who they might have admired from afar from some time?

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These kind of demos are consistently fascinating and, in my own experience, always leave people with a sense of "yes, I could do that" that uplifts a-team long enough to have at least a little, and hopefully bigger, effect back where it matters. If talking at people, alone, created positive and actual change in groups, then it might never be necessary to ever operate a-team building event.

Having worked in the industry for many, many years there are few, if any, team periods that present any surprised or my facilitation team colleagues. Having had the benefit of a good briefing from our client contacts, we likely understand exactly what the team issues are well enough at the onset of the action to just stand up and say "Here are your learning factors".
But that would not have any effect. Learning is necessary for groups to take possession of the changes and education isn't learning. Learning calls for proactive effort and understanding on behalf of these included and favorable change demands it to be bought in to by all associates.