[Help-gsl] 答复: Help-gsl Digest, Vol 5 5, Issue 8

[Bo Schwarzstein]

Hi Bolli,
        Are you working on point cloud reconstruction? I am working on it, also 
hope GSL will implement RBF functions.

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发送时间: 2008年5月16日 0:02
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主题: Help-gsl Digest, Vol 55, Issue 8

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Today's Topics:

   1. RBF: Radial Basis Function in GSL (Stefano Bolli)
   2. Cross product between two vectors ( Ronald R?mer )
   3. Re: Cross product between two vectors (Martin Jansche)
   4. Re: Cross product between two vectors (John Pye)
   5. debugging with gdb (Joe Bloggs)


----------------------------------------------------------------------

Message: 1
Date: Wed, 14 May 2008 22:37:20 +0200
From: "Stefano Bolli" <address@hidden>
Subject: [Help-gsl] RBF: Radial Basis Function in GSL
To: address@hidden
Message-ID:
        <address@hidden>
Content-Type: text/plain; charset=ISO-8859-1

Hi.

I am interesting in RBF (Radial Basis Function) someone know if exists some
specific function or libraries
in GSL, or if it is possible to implement RBF analisys using GSL in a smart
way.

Thanks

Stefano Bolli


------------------------------

Message: 2
Date: Thu, 15 May 2008 03:37:03 +0200
From: " Ronald R?mer " <address@hidden>
Subject: [Help-gsl] Cross product between two vectors
To: address@hidden
Message-ID:
        <address@hidden>
Content-Type: text/plain; charset=ISO-8859-1

Hello out there,

I will perform a simple cross product between two vectors. What ist the
right way to do this, because I can not found a function in gsl to do this
simple calculation? After that I will also perform a normalization of the
resulting vector.

Greetings


------------------------------

Message: 3
Date: Wed, 14 May 2008 22:25:24 -0400
From: "Martin Jansche" <address@hidden>
Subject: Re: [Help-gsl] Cross product between two vectors
To: " Ronald R?mer " <address@hidden>
Cc: address@hidden
Message-ID:
        <address@hidden>
Content-Type: text/plain; charset=ISO-8859-1

The 3d cross product can be easily written as a short inline function.
 There is no GSL method for the cross product because it is not
defined in general for arbitrary GSL vectors.  If you're doing a lot
of 3d vector computations, you might want to look into graphics
libraries instead of GSL.
-- mj

On Wed, May 14, 2008 at 9:37 PM, Ronald Rvmer <address@hidden> wrote:
> Hello out there,
>
>  I will perform a simple cross product between two vectors. What ist the
>  right way to do this, because I can not found a function in gsl to do this
>  simple calculation? After that I will also perform a normalization of the
>  resulting vector.
>
>  Greetings
>  _______________________________________________
>  Help-gsl mailing list
>  address@hidden
>  http://lists.gnu.org/mailman/listinfo/help-gsl
>




------------------------------

Message: 4
Date: Thu, 15 May 2008 16:03:26 +1000
From: John Pye <address@hidden>
Subject: Re: [Help-gsl] Cross product between two vectors
To: Ronald R?mer <address@hidden>
Cc: address@hidden
Message-ID: <address@hidden>
Content-Type: text/plain; charset=ISO-8859-1

Martin Jansche wrote:
> The 3d cross product can be easily written as a short inline function.
>  There is no GSL method for the cross product because it is not
> defined in general for arbitrary GSL vectors.  If you're doing a lot
> of 3d vector computations, you might want to look into graphics
> libraries instead of GSL.
> -- mj
>   

Here is some fairly self-contained C code that you might like to use.
There is any number of other libraries you could try too, of course,
depending on your particular application.

http://frame3dd.svn.sourceforge.net/viewvc/frame3dd/trunk/src/microstran/vec3.h?view=markup
http://frame3dd.svn.sourceforge.net/viewvc/frame3dd/trunk/src/microstran/vec3.c?view=markup

Also a small test suite:

http://frame3dd.svn.sourceforge.net/viewvc/frame3dd/trunk/test/testvec3.cpp?revision=79&view=markup

If anyone one has similar code like this, please let me know. Especially
if anyone has a nice implementation of coordinate transformations
including quaternions in plain C.

Hope that helps

Cheers
JP

> On Wed, May 14, 2008 at 9:37 PM, Ronald Rvmer <address@hidden> wrote:
>   
>> Hello out there,
>>
>>  I will perform a simple cross product between two vectors. What ist the
>>  right way to do this, because I can not found a function in gsl to do this
>>  simple calculation? After that I will also perform a normalization of the
>>  resulting vector.
>>
>>  Greetings
>>  _______________________________________________
>>  Help-gsl mailing list
>>  address@hidden
>>  http://lists.gnu.org/mailman/listinfo/help-gsl
>>
>>     
>
>
> _______________________________________________
> Help-gsl mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/help-gsl
>   





------------------------------

Message: 5
Date: Thu, 15 May 2008 14:19:02 +0100
From: Joe Bloggs <address@hidden>
Subject: [Help-gsl] debugging with gdb
To: address@hidden
Message-ID: <address@hidden>
Content-Type: text/plain; charset=us-ascii

I am using gdb to debug my code, and I want to step into a gsl function to see 
what's going on exactly (gsl_multimin_fdfminimizer_iterate).
I have installed the debug symbols and development packages, but gdb can't find 
the associated source code, and neither can I:

gsl_multimin_fdfminimizer_iterate (s=0x80a8f70) at fdfminimizer.c:133
133     fdfminimizer.c: No such file or directory.
        in fdfminimizer.c

I am using Debian etch.
Can anyone help?





------------------------------

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