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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] ideas about the corner types
- From: Ricard Marxer Piñón <email@xxxxxxxxxxxxxxxx>
- Date: Fri, 5 Feb 2010 10:23:04 +0100
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On Fri, Feb 5, 2010 at 8:46 AM, Thomas Capricelli <orzel@xxxxxxxxxxxxxxx> wrote:
>
> In data venerdì 05 febbraio 2010 08:11:06, Benoit Jacob ha scritto:
>> 1)
>>
>> Currently matrix.corner(TopLeft,3,3) takes TopLeft as a runtime
>
> Yes, i wondered why there was no compiletime version of this. I use it in several places, and which corner i want is always known at compile time. Does it really provide room for improvement to know this at compile time ?
>
>> 2)
>> Many times we just want the bottom N rows of a matrix. So why not
>> introducing Bottom, Top, etc... new corner types.
>
> Indeed, i very often do things like m.corner(TopLeft, m.rows(), smaller_nb_of_cols). Not a very big deal for me, but i could use some one-parameter stuff like Bottom/Top. I wouldn't like to prevent you working on more important features though!
>
+1 for this. I do that very often as well.
> ++
> Thomas
> --
> Thomas Capricelli <orzel@xxxxxxxxxxxxxxx>
> http://www.freehackers.org/thomas
>
>
>
--
ricard
http://www.ricardmarxer.com
http://www.caligraft.com