Pete
I use Octave all the time for numerical work
(http://www.gnu.org/software/octave/). Although it is meant to be used
as a command line interpreter, I believe many or all the routines can be
called from within C++. Here is a FAQ that says something about this:
http://wiki.octave.org/wiki.pl?CategoryFAQ
And here is another document talking about Octave and c++:
http://octave.sourceforge.net/coda/index.html
If you are unfamiliar with Octave, there might be a bit of learning
before you can do what you are asking. However, I doubt you will find a
free numerical package that supports as many numerical routines or has
as many active users and developers.
Regards,
Jonathan
Peter Jay Salzman wrote:
Is there something equivalent to LAPACK or NAG in C? Something free (as in
beer is OK by me).
I need some high powered stuff like SVD factorization, linear solvers that
specialize in rank deficient problems, n-th order polynomial least curve
fitting, rank tolerant matrix equation solvers, etc.
I know something like NAG (don't want to pay for it) and LAPACK (don't want
the headache of interfacing with fortran if I don't have to) has them. I've
seen something called LAPACK++, which would be my next choice if something
in C isn't available.
Can anyone grant me temporary access to a machine with NAG? That would work
too.
Thanks!
Pete
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