oh crap someone got 2.9 to build in cygwin?
would it be too much of a problem to ask for you help to build it myself?
On 5/29/07, Tatsuro MATSUOKA <address@hidden> wrote:
> Dear Prof. John W. Eaton
>
> >
> > https://www.cae.wisc.edu/pipermail/bug-octave/2007-May/002487.html
> >
> >jwe
> >
> Thank you for your mail. I have succeded in buiding Octave 2.9.12.
> Thanks a lot.
>
>
> On cygwin, the compiler gcc 3.4.4-3 has still the problem.
> With the compiler gcc 3.4.4-3 on cygwin, I could not build atlas.
> I still have to use gcc 3.3.3-3.
> I hope the cygwin support will gcc ver 4.
>
> By the way
> I tested LU decomposition by the Octave 2.9.12 built by cygwin. (with ATLAS)
> lutest
> Simple left division
> ans = 10.229
> LU decomposition
> ans = 0.14200
>
> MSVC 2.9.12 by Michael Goffioul
>
> Simple left division
> ans = 5.4591
> LU decomposition
> ans = 0.19162
>
> I feel performance the matrix clclation of 2.9.xx series.
>
>
>
> *********lutest.m**************
> % test LU decomposition
> Num=1000; ItNum=10;
> id=1:Num;
> rand("seed",1);
> A=rand(Num)-0.5;
> rand("seed",2);
> B=rand(Num,ItNum)-0.5;
> [L U P]=lu(A);
> %
> disp("Simple left division");
> ts=time();
> for k=1:ItNum
> b=B(:,k);
> x=A\b;
> end
> time()-ts
> x1=x;
> %
> ts=time();
> disp("LU decomposition");
> ts=time();
> for k=1:ItNum
> b=B(:,k);
> c=P*b; y=L\c; x=U\y;
> end
> time()-ts
> x2=x;
> plot(id,x1,"o1",id,x2,"+2");
> *********************************
>
> I have a lecture about nummerical calclation for the chemincal Engineer course
> student. (undergraduate, the 4th grade.)
> I use the octave for the nummerical tool.
> In Japan, the octave is not popular to the chemical engineer.
>
> Although many of them of course know Prof. Levenspiel, but do not know
> the octave software.
>
> I am introducing the octave to my colleges of other univrersities in Japan.
> ***************************************************************
> Dr. Tatsuro MATSUOKA
> Associate Professor
>
> Department of Molecular Design and Engineering
> Graduate School of Engineering
> Nagoya University
> Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
> E-mail address@hidden
> Tel. +81(Japan)-52-789-3274
> FAX +81(Japan)-52-789-3273
> ****************************************************************
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