[OctDev] =?iso-8859-2?Q?arpack_+_octave_=3D_problem?=

[<ctk...@o2...>]

Hello,

I am trying to implement function eigs(), as Matlab does it, using an Arp=
ack library. Unfortunately I’ve stacked at the beginning and can't =
move any step forward.

Problem is as follows...
Simple program using arpack written in C  works OK. But almost the same c=
ode used as a function in oct-file produces wrong results. For example ap=
rack function asked for starting vector always returns [NaN NaN NaN ....]
Of course, the same problem arise in C++ instead if C.

I think of some memory problem. It looks like aprack functions are referr=
ing to wrong place in memory when called from octave function. However, s=
ome of them do it all right. I've debug Arpack some how, and notice that =
i.e. this starting vector looks all right till it is normalized. =20

I wonder if:
1)anybody has faced similar problem?
2)anybody is interested in helping me? If so, I'll put some more details.

Regards,
Czarek Tkaczyk