By

When I use IMDIF, I find it is very sensitive to the initial guess. Are there any ways to deal with it? Thanks!

By

Hello,

Does anyone compiled the CLAPACK2.0 using C/C++ WATCOM compiler 10.6 ?

I have tried to compile CLAPACK with WATCOM C/C++10.6 compiler on

PC running windows 95, but I have got a lots of messages

e.g. F2CLIB\libf77\abort.c' ....it is "no return value",

however, some of routines were compiled without any problem.

Seems to me that for some particular routines , I used wrong switches (options).

I followed the README file in CLAPACK package, but

the option MSDOS and/or NON_UNIX_STDIO did not solve compilation problems.

Any suggestions ?

Does exist some kind of step by step procedure for compiling the CLAPACK via

Watcom C/C++ 10.6 compiler under win95 ?

Are CLAPACK pre-compiled libraries available?

Thanks a lot

Slavomir MATAS e-mail : matas@saske.sk

IEP SAS

043 53 Kosice

Slovak Republic

By

I´d like to use Lapack++ (a real Newbie) but have problems to get it running. Which libraries must I link (for safety I´ve linked all that were made/used during compilation of CLapack and Lapack++)? And: When trying to compile a program that uses Lapack++ I get loads of undefined references, e.g. ´in function ilaenv_ to s_copy´. This may have something to do with C++ and F2C, but I don´t know how to resolve the problem. Can someone help me? Thanks.

Hauke

By

Hi,

i try to build lapackpp libraries in DEC Alpha running OSF 4.0A with egcs-1.1b compiler. However,

i stuck with this error messages:

g++ -I../include -DALPHA -c lautil.cc

In file included from lautil.cc:29:

../include/lautil.h:17: warning: ANSI C++ forbids declaration `' with no type

../include/lautil.h:17: abstract declarator `int' used as declaration

lautil.cc: In function `int LaEnvBlockSize(const char *, const class LaGenMatDouble &)':

lautil.cc:43: warning: implicit declaration of function `int ilaenv_(...)'

*** Exit 1

if i use the gcc 2.7.2.1 compiler in Intel Linux,

it compiles without a problem.

i'll appreciate very much if you could tell me

how to solve this problem or find a way around it.

has anyone compile lapackpp with egcs compiler in

DEC Alpha OSF? can i get it?

Thansk,

lihsin

lihsin@astro.phys.clemson.edu

By

Hi, I have been trying to use the lapackpp package for a unix work station. But, I get the following message at the end when I do the "make all" testing after down loading the libraries:

Unresolved:

s_wsfe

do_fioi4

e_wsfe

do_fio

f_exit

f77fatal

collect2: ld returned 1 exit status

*** Error code 1 (bu21)

*** Error code 1 (bu21)

can any one help me how to fix this.

By

HI, there,

May I have a question.

I am trying to solve a system of highly nonlinear

equtions. But using linear search method, it always converge to a LOCAL minimum point instead of the GLOBAL mimimum point. From most books in this field, the only way to search the exact solution is trying another initial guess, but I have no idea about this so far.

My question is you know where and how i can get the fortran subroutine to search the GLOABL minimum points.

Thanks a lot in advance

Yours sincerely.

w.m.lu

By

Hi, does anyone know the algorithm used by

passport readers?

Thanks!

bill_allen9@hotmail.com

By

Any one out there has a version of SVD

in C code for COMPLEX input matrices?

Most of the versions that I come across

are for real input matrices!

Thanks

By

Hi,

I m using the parallel version of lapack, scalapack. I wanted to solve a 1000 by 1000 dense non symetric matrix using PVM on 9 processors but the software returned a message error saying there was a lack of memory (Total Memory required is about 4 Mbytes). Since my available total memory is quite larger than that, I suppose it is an artificial limitation of the soft.

How could I change it ?

Thanks

manuel Capouet

mjcapoue@vub.ac.be

By

I can't find the routines s_cat, s_cmp and s_copy, needed in CLAPack. I can guess at what they do, but I prefer to download them.

Where are they ?

Thanks,

By

S_cat, s_cmp and s_copy found in libf2c.

By

Does anyone know how perform mathematical operation to 3 slaves with the use of 1 master and get the final output by getting processing time?

By

Does anyone know how to use the sobol sequence

in Numerical Recipes C? Here I want to generate the normal(0,1) using quasi random numbers:

/*********************************************

float *x;

int M=3,n1=(-1);

x=vector(1,M);

sobseq(&n1,x);

for(i=1;i<1024;i++){

sobseq(&M,x); quasi_ran1 = x[1];

sobseq(&M,x); quasi_ran2 = x[1];

normal_ran

=sqrt(-2*log(quasi_ran1))*sin(2*pi*quasi_ran2);

printf("%10.6f ",normal_ran);

}

/**********************************************/

It seems what I got are not normal(0,1).

Can anyone help me?

Thanks a lot.

By

I'm currently using MS VC++ and have been using

a pre-compiled .dll of CLAPACK from phc.chalmers.se/~agris. But I have now

discovered errors in this compilation. Is there anywhere else a version of CLAPACK for VC++ can be downloaded or any tips on its compilation.

Any help is very much appreciated.

By

Hi,

I have this problem:

I have large sparse matrix and I need to solve a problem of the type: x'=Ax+bu

whit A square sparse matrix, I need of a C routine to calculate the inverse of A and multiplied a sparse matrix for a vector.

Could you help me?

my Email:

fontana70@hotmail.com

Thank you!

By

Hi everybody,

I am looking for a parallel version to solve symmetric complex matrices. Currently I am using zspsv (zsptrf/zsptrs) from LAPACK. Are there any suggestions for me?

Many thanks

Alfred

By

Does anyone would like to share his/her experienced in using LSODI from ODEPACK.

1. Is it just CALL LSODI from main program ?

2. Is there hidden trick or hint to use it ?

3. How to get subroutine xerrwv ?

Thanks a lot

By

Does anibody know how to solve the following problem?

I need to compile a simple program in Microsoft VC++ but the linker gives me the error:

LAPACK.lib : fatal error LNK1106: invalid file or disk full: cannot seek to 0x374def12

Error executing link.exe.

Does anybody know the reason?

By

I have a polynomial with real coefficients. The order is anywhere from 5-9. I'd like to solve for the roots as quickly as possible. However, I'm only interested in real roots that fall within a predetermined interval. Though a general root finder would work, I was wondering if there was an alogorithm out there that, by taking into account my interest in only a subset of the polynomial's roots, would run faster.

Please cc to tombell@integrinautics.com. Thanks in advance.

Tom

By

Hi folks,

I have this error in Microsoft VC++5.0 when I use

LAPACK.lib:

LAPACK.lib : fatal error LNK1106: invalid file or disk full: cannot seek to 0x374def12

Error executing link.exe.

Does anybody know how to solve it?

By

The .lib might have been built with another version of MSVC.

By

I have a function f of one variable T

(running from 0 to 1) that is only

continuous. There is no simple expression

for the function. However, given a value

of T, I can compute value of f by an algorithm.

I want to find the smallest root of

f (smallest positive T for which

f(T) = 0).

I have done a search on Netlib and I have

not been able to locate any program that

finds the smallest/first root. Any

pointers/comments would be appreciated.

Thanks. Please reply to sridhara@postmark.net.

By

Hello -

This is with reference to my posting on

Sunday, January 23, 2000 with regard

to finding the first root of a function

that is only continuous. I had

inadvertantly put a period after net

in my e-mail address. The correct

address is : sridhara@postmark.net

Apologies for any bounced mails.

I have tried some variations of the

bisection method and the regula falsi

method and have not had much success.

It is not clear whether I should pursue

approaches based on random walks to find

roughly a point where f may be negative

and then backtrack. Thanks. Sridharan

By

Morning everybody,

I have a problem with linear programming. There

is a linear optimization problem that seems to

be cyclic and the procedures I have used up to now

failed to give a satisfactory answer (they always

find a trivial solution).

Does anybody know any procedures that takes into

account the degeneracy of the problem?

Is the degeneracy a common problem? I am asking for it seems to me that I've found a huge set of

degenerate problems.

By

Hello everybody!

I'm a desperate newbie and i need to use lapack++ with Visual C++ 6.0. I tried to build the library with Vis.Stud. but nothing, i then tried with DJGPP but i can't overcome the problems i have. Can anyone give me a step by step instruction? Has any of you used the library on a pc with Visual C++?

thank you in advance

jim

By

Hello everybody!

I'm a desperate newbie and i need to use lapack++ with Visual C++ 6.0. I tried to build the library with Vis.Stud. but nothing, i then tried with DJGPP but i can't overcome the problems i have. Can anyone give me a step by step instruction? Has any of you used the library on a pc with Visual C++?

thank you in advance

jim