|Re: [eigen] New Levenberg Marquardt stuff|
[ Thread Index |
| More lists.tuxfamily.org/eigen Archives
- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] New Levenberg Marquardt stuff
- From: Victor Liu <victor.liu@xxxxxxxxx>
- Date: Fri, 07 Dec 2012 15:05:02 -0800
- Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:x-enigmail-version:content-type :content-transfer-encoding; bh=0+lKmOuYRhV0JBpA7180MDG1yoTr0hhbgnO6AkUR4u8=; b=rS0H7CvI3wx/Bi3DdI2I8bf/5ai72E0qViJR5JeVQHTwsSjXeBbEk3p++IDRr6ywNv wQzNMTJIVwmDXFmw+A+1BOpa/TQylxZM0GFT9bM5jqUHKnhLljP4eZxWh3DMPInJVmtI KIu3qaeNC/2JJo/iqGD3/G49vXNoRotAsy+WK1JL6foJjkTtLEFDb8YvcuXk0EMCLUol snwBqKiXZkKYUmRT3pNXmbEFeWCs2yIY/y06ve1oZZJGqoJsiStD4CI3gbjoH2cCzbdK TE9Jc9kKJQInDwmbQndxzSTS2O5q4a9TqhXFzNBunHBuqWsdwnCs4XMtWivp4NXnL/TZ BuOg==
So, I have two main use cases:
1) I just want basic linear algebra stuff like GEMM and LU
factorization. Eigen is overkill for that and typically in these cases
the code is pure C (we actually still have an old AIX box which has such
an old C++ compiler, most template stuff won't compile). In this case
I'll just call BLAS/Lapack directly or roll my own short routines.
2) I need super advanced features like MRRR tridiagonal eigensolver, or
Lapack's (much faster) SVD or GEP solvers, which Eigen doesn't
implement. So I have to call BLAS/Lapack directly.
I'm still sitting on this mailing list in hopes that some charitable
soul will spend the man hours to port those advanced features :).
On 12/07/2012 02:59 PM, Thomas Capricelli wrote:
> Il 07/12/2012 23:44, Victor Liu ha scritto:
>> I have often thought about using Eigen for my own scientific computing
>> projects, but each time I have been deterred by what I consider its
>> enormous size (don't even get me started about Boost)
> Eigen big ? I disagree totally. if you remove doc/tests, the code is
> worth 3.5Mb (Eigen/src). That's NOTHING compared to what it does. And
> it's only includes...
> I'm not the author, i'm allowed to say how great it is :-)