Re: [eigen] Documentation : it's a sprint!! |

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*To*: eigen@xxxxxxxxxxxxxxxxxxx*Subject*: Re: [eigen] Documentation : it's a sprint!!*From*: Carlos Becker <carlosbecker@xxxxxxxxx>*Date*: Thu, 1 Jul 2010 12:25:48 +0100*Dkim-signature*: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=32AERSX+5rfj088xOp2YFgdKq30XgDhweQndXMau2+g=; b=XHHmCQrvSTdE6ZlZDqfp2bSDQXGnug8wacs+6hDCK+oC4cFOwlCpkL4GqvemduK35W e6O+0lA4Q3F2BdVo2dClCK2PTVKCOiPOgVwNnI7LEq9QPdGJCY9q5NW7pO4IhSd2H4A4 3nAMfDUVotZH3uEp8QrmlaGdg1MAwT6pvRNkg=*Domainkey-signature*: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=c+lzDV/gRkr8ql7we5jjOd3EKMtfS4lRa5oZD7bo8f6p5Fq0DE6SuOt1HzpqduB5Iy R6s3EZskwRmKmaF85UR/ZUCTP+ulbZ+074BrEruWLrVAqpfYX/H2nScbRsqNzupyMUN8 phi/WHtFOxbsXYakvgbKEpOU8lyR/mlKiNwDo=

Just a quick question: what would be the difference between visitors and broadcasting? Seems to me that broadcasting is able to 'visit' column or row-wise, also modifying the data inside the matrix/array object, am I right? I haven't used broadcasting with eigen before.

On Wed, Jun 30, 2010 at 1:30 PM, Carlos Becker <carlosbecker@xxxxxxxxx> wrote:

oh ok sorry, got confused since I thought that someone was alreay writing the sparse tut

On Wed, Jun 30, 2010 at 1:29 PM, Gael Guennebaud <gael.guennebaud@xxxxxxxxx> wrote:nevermind, this C07_TutorialSparse.dox file is an old one...

gael

On Wed, Jun 30, 2010 at 2:26 PM, Carlos Becker <carlosbecker@xxxxxxxxx> wrote:

> I am starting with the reductions/visitors/broadcasting tutorial and just

> noticed that the sparse tutorial is named as C07_TutorialSparse.dox.

> According to the order in http://eigen.tuxfamily.org/dox-devel/ it should be

> C08 and C07 is to be the one I am doing. This is a silly question but just

> wanted to make sure we are all following the same conventions.

> Carlos

>

> On Sun, Jun 27, 2010 at 1:59 PM, Gael Guennebaud <gael.guennebaud@xxxxxxxxx>

> wrote:

>>

>> On Sun, Jun 27, 2010 at 12:41 PM, Carlos Becker <carlosbecker@xxxxxxxxx>

>> wrote:

>> > Mmm I am trying to think of a straightforward explanation for this. What

>> > do

>> > you think about calling them fixed-size and dynamic-size blocks, where

>> > the

>> > former differs from the later because its size is known at compile-time.

>>

>> a slightly more precise variant: "the latter are optimized versions of

>> the former when the size is known at compile-time." I just added the

>> word "optimized"

>>

>> you might also have a look at the reference tables, section "Sub

>> matrices" to see how they are presented. The old version of this

>> section is available online there:

>>

>>

>> http://eigen.tuxfamily.org/dox-devel/TutorialCore.html#TutorialCoreMatrixBlocks

>>

>> gael

>>

>> >

>> >

>> > On Sun, Jun 27, 2010 at 11:02 AM, Carlos Becker <carlosbecker@xxxxxxxxx>

>> > wrote:

>> >>

>> >> Yes, I got that and actually it was my mistake since I supposed that it

>> >> was only for fixed-size matrices, so now I am changing it..

>> >> Thanks,

>> >>

>> >>

>> >> 2010/6/27 Björn Piltz <bjornpiltz@xxxxxxxxxxxxxx>

>> >>>

>> >>> "The following tables show a summary of Eigen's block operations and

>> >>> how

>> >>> they are applied to fixed- and dynamic-sized Eigen objects."

>> >>> This quote and the following table gives the impression that the

>> >>> fixed

>> >>> size functions are only available for fixed size matrices. But using

>> >>> fixed

>> >>> size vs dynamic size functions acually only determin the return type.

>> >>> Björn

>> >

>> >

>>

>>

>

>

**Follow-Ups**:**Re: [eigen] Documentation : it's a sprint!!***From:*Benoit Jacob

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