Hi Vitaly:
On Sunday 12 August 2001 04:14 pm, you wrote:
Then:
on Celeron-333@500MHz,
SuSE 7.2
Octave 2.0.16 : 70.0 secs
MATLAB 5.3 : 4.0 secs
Octave slow run time is due to the fact that it does not have ATLAS linked
libraries. At least that is what I am told. The relevant info is from John
Eaton creator of Octave:
From: "John W. Eaton"
| please suggest how I might improve execution speeds for Octave, especially
| under Linux?
|
| The tests I ran were:
|
| tic;A=rand(20,20000);B=svd(A);toc
<snip>
I believe all of these operations involve calls to lapack and/or blas
libraries. If you use a recent development version of Octave linked
with the atlas libraries, then you will probably see some improvement.
jwe
------------------------------------------------------------------------------------------------------
Further info on Octave is at: http://www.octave.org/
Old habits die hard. Too many folks use their Linux boxes in the same way
they would a Windows machine. There is no reason not to run *MANY* Octaves at
the same time. Since: a) Linux is truly multitasking and b) there is no
"site" license for Octave. If one Octave session is taking a while to
compute, minimize the Xterm and start another one. It is perfectly feasible
to have four or more Octaves running at the same time. Furthermore you can
run Octave inside EMACS, on SuSE. Do M-x run-octave. The idea here is you can
login at another virtual console and do emacs -nw, and then run Octave.
dont think it's a good reason to compare these two systems.
i never used OCTAVE and i wonder -- how well is it compatible with
MATLAB 5 (at least)
It is very compatible with MatLab. Many commands are "cognates" or exactly
the same. The foo.m files use almost the same syntax. Here is a simple
example:
function r = dist(x,y)
r = sqrt(x*x + y*y);
endfunction
For the benefit of the other SuSE users, it should be mentioned that
MatLab, for non-students, costs a bankrupting $1730.00 (this is not a typo!).
Why I could buy a second AMD equipped computer and run dozens of Octaves at
the same time with SuSE at that price.
--
Cheers,
Jonathan
