I got NMatrix installed on my machine. I sort of followed the instructions
on SciRuby. But instead of going to the SciPy site and installing the ATLAS
from source I used the Ubuntu packages. I also had to make a couple of
symlinks. Personally I prefer using packages over compiling and installing
libraries myself.
I will write something up later and post it here and on my website.
The reason for compiling ATLAS is to get a set of BLAS and LAPACK that
is optimized for your system. That is something that an Ubuntu package
cannot do. ATLAS will probe your CPU, figure out what features it has,
and edit the compile system so that you get BLAS designed to squeeze
every ounce out of architecture. In contrast, pre-compiled packages
from Ubuntu have to assume nothing about your CPU and only use the
features that are common to all CPUs, including 10 year-old CPUs.
Basically, for simple calculations it just doesn't matter, and if your
work doesn't involve linear algebra then the BLAS don't matter either.
But if you want to invert large matrices, compiling ATLAS makes a
world of a difference. Alternatively, you can use the MKL from Intel
which contain BLAS optimized by Intel for its own CPUs, so they are
really good. Because the BLAS are such an important core of a lot of
scientific work, every CPU manufacturer will give you BLAS that are
optimized for its CPUs.
Cheers,Daniel.
On Wednesday, August 01, 2012 at 4:04 AM, Eric MacAdie wrote:I got
NMatrix installed on my machine. I sort of followed the instructions
on SciRuby. But instead of going to the SciPy site and installing the
ATLAS from source I used the Ubuntu packages. I also had to make a
couple of symlinks. Personally I prefer using packages over compiling
and installing libraries myself.
I will write something up later and post it here and on my website.
Eric, I'm really interested in the steps you took (I've not been successful
so far, but it was very early on when I last tried).
That's also a great point Daniel. Even though the project is under active
development, we ought to have a wiki page with step by step instructions on
installation (both compiling and with packages since both are highly
useful). Then, the README could just point to the wiki page... This
should be done sooner rather than later because folks can't really
contribute until they can compile.
Of course, I'm happy to post to the wiki the instructions once I actually
get it to work.
On Wed, Aug 1, 2012 at 10:08 AM, John Prince <jtpri...@gmail.com> wrote:
> Eric, I'm really interested in the steps you took (I've not been
> successful so far, but it was very early on when I last tried).
> That's also a great point Daniel. Even though the project is under active
> development, we ought to have a wiki page with step by step instructions on
> installation (both compiling and with packages since both are highly
> useful). Then, the README could just point to the wiki page... This
> should be done sooner rather than later because folks can't really
> contribute until they can compile.
> Of course, I'm happy to post to the wiki the instructions once I actually
> get it to work.
I'm trying to compile NMatrix here (OS X 10.7.4). I downloaded ATLAS, but there's a problem in the make install step... First of all, the error I get from nmatrix compilation:
(...)
> checking for cblas_dgemm() in -lcblas... yes > checking for ATL_dgemmNN() in -latlas... no > checking for cblas.h in /usr/local/include,/usr/local/atlas/include... no > checking for main() in -lf2c... no > checking for f2c.h... no > creating nmatrix_config.h > creating Makefile > (...)
It can't find cblas.h and I thought it'd be a good idea to install atlas and lapack from source. (wtf was I thinking?)
It's very late here and I have some stuff to do tomorrow, but I'd like to hear how you all installed atlas/lapack in your systems. Reading Eric's blog, I think that I need to find and symlink the current install from OS X so nmatrix will find it. But it'd be great to *know* how to compile and everything - more information for the wiki etc.
> I'm trying to compile NMatrix here (OS X 10.7.4). I downloaded ATLAS, but
> there's a problem in the make install step... First of all, the error I get
> from nmatrix compilation:
> (...)
>> checking for cblas_dgemm() in -lcblas... yes
>> checking for ATL_dgemmNN() in -latlas... no
>> checking for cblas.h in /usr/local/include,/usr/local/atlas/include... no
>> checking for main() in -lf2c... no
>> checking for f2c.h... no
>> creating nmatrix_config.h
>> creating Makefile
>> (...)
> It can't find cblas.h and I thought it'd be a good idea to install atlas
> and lapack from source. (wtf was I thinking?)
> It's very late here and I have some stuff to do tomorrow, but I'd like to
> hear how you all installed atlas/lapack in your systems. Reading Eric's
> blog, I think that I need to find and symlink the current install from OS X
> so nmatrix will find it. But it'd be great to *know* how to compile and
> everything - more information for the wiki etc.
> On Wednesday, August 1, 2012 12:45:55 PM UTC-3, jtprince wrote:
I edited it directly on cblas.c and nmatrix.inc.h files, so the #include
<cblas.h> points to OS X's specific installation. I've read extconf.rb (the
first time I read one!) and it appears like this type of installation issue
can be solved adding the directories there.
Don't worry, I've already solved it - to test Daniel's code and my rand()
method to create the pull request I sent you. I'll try to replicate this
error and try to solve it some other ways when I have enough time. All the
results will be reported here :)
> Sometimes it's not problematic that cblas.h isn't found, particularly if
> you *have* cblas.h. It may be a problem with extconf.rb.
> But I've never seen this particular error. Were you able to find it on
> Google?
> John
> On Thu, Aug 2, 2012 at 12:19 AM, Carlos Agarie <carlos.aga...@gmail.com>wrote:
>> I'm trying to compile NMatrix here (OS X 10.7.4). I downloaded ATLAS, but
>> there's a problem in the make install step... First of all, the error I get
>> from nmatrix compilation:
>> (...)
>>> checking for cblas_dgemm() in -lcblas... yes
>>> checking for ATL_dgemmNN() in -latlas... no
>>> checking for cblas.h in /usr/local/include,/usr/local/atlas/include... no
>>> checking for main() in -lf2c... no
>>> checking for f2c.h... no
>>> creating nmatrix_config.h
>>> creating Makefile
>>> (...)
>> It can't find cblas.h and I thought it'd be a good idea to install atlas
>> and lapack from source. (wtf was I thinking?)
>> It's very late here and I have some stuff to do tomorrow, but I'd like to
>> hear how you all installed atlas/lapack in your systems. Reading Eric's
>> blog, I think that I need to find and symlink the current install from OS X
>> so nmatrix will find it. But it'd be great to *know* how to compile and
>> everything - more information for the wiki etc.
>> On Wednesday, August 1, 2012 12:45:55 PM UTC-3, jtprince wrote:
> I edited it directly on cblas.c and nmatrix.inc.h files, so the #include
> <cblas.h> points to OS X's specific installation. I've read extconf.rb (the
> first time I read one!) and it appears like this type of installation issue
> can be solved adding the directories there.
> Don't worry, I've already solved it - to test Daniel's code and my rand()
> method to create the pull request I sent you. I'll try to replicate this
> error and try to solve it some other ways when I have enough time. All the
> results will be reported here :)
>> Sometimes it's not problematic that cblas.h isn't found, particularly if
>> you *have* cblas.h. It may be a problem with extconf.rb.
>> But I've never seen this particular error. Were you able to find it on
>> Google?
>> John
>> On Thu, Aug 2, 2012 at 12:19 AM, Carlos Agarie <carlos.aga...@gmail.com>wrote:
>>> I'm trying to compile NMatrix here (OS X 10.7.4). I downloaded ATLAS,
>>> but there's a problem in the make install step... First of all, the error I
>>> get from nmatrix compilation:
>>> (...)
>>>> checking for cblas_dgemm() in -lcblas... yes
>>>> checking for ATL_dgemmNN() in -latlas... no
>>>> checking for cblas.h in /usr/local/include,/usr/local/atlas/include...
>>>> no
>>>> checking for main() in -lf2c... no
>>>> checking for f2c.h... no
>>>> creating nmatrix_config.h
>>>> creating Makefile
>>>> (...)
>>> It can't find cblas.h and I thought it'd be a good idea to install atlas
>>> and lapack from source. (wtf was I thinking?)
>>> It's very late here and I have some stuff to do tomorrow, but I'd like
>>> to hear how you all installed atlas/lapack in your systems. Reading Eric's
>>> blog, I think that I need to find and symlink the current install from OS X
>>> so nmatrix will find it. But it'd be great to *know* how to compile and
>>> everything - more information for the wiki etc.
>>> On Wednesday, August 1, 2012 12:45:55 PM UTC-3, jtprince wrote:
