Subject: Re: Kronecker Product - msg#00004

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Re: gsl: : ERROR

Eric Germaneau writes: > I'm using random number generators (_gsl version_: 1.5 on a linux > cluster) and after several thousand times I've got get this error: > gsl: symmv.c:79: ERROR: ... > In fact I tried two random number generators (mt19937, taus) which have > given rise to different errors: > > *mt19937:* /gsl: symmv.c:79: ERROR: failed to allocate space for _sines_/ > *taus:* /gsl: symmv.c:65: ERROR: failed to allocate space for > _subdiagonal_/_ _ > > Does someone has any idea about how to solve this probleme? It's probably a memory leak in your program... I don't think the random number generator has anything to do with it. Look up 'mtrace' in the GNU C Library reference manual for one way to debugging memory leaks. -- Brian Gough Network Theory Ltd, Publishing Free Software Manuals --- http://www.network-theory.co.uk/

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Re: question about solving the eigensystem

Cheng-Hung Ko writes: > In GSL, it provides functions to solve eigensystem of real > symmetric matrix. However, I can't find the method to solve the > eigensystem of a generic real matrix. Does GSL plan to implement > these functions? Not in the near future as it is a fairly difficult problem. -- regards Brian Gough

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Re: gsl: : ERROR

Eric Germaneau writes: > I'm using random number generators (_gsl version_: 1.5 on a linux > cluster) and after several thousand times I've got get this error: > gsl: symmv.c:79: ERROR: ... > In fact I tried two random number generators (mt19937, taus) which have > given rise to different errors: > > *mt19937:* /gsl: symmv.c:79: ERROR: failed to allocate space for _sines_/ > *taus:* /gsl: symmv.c:65: ERROR: failed to allocate space for > _subdiagonal_/_ _ > > Does someone has any idea about how to solve this probleme? It's probably a memory leak in your program... I don't think the random number generator has anything to do with it. Look up 'mtrace' in the GNU C Library reference manual for one way to debugging memory leaks. -- Brian Gough Network Theory Ltd, Publishing Free Software Manuals --- http://www.network-theory.co.uk/

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complex matrix generation with GSL???

Dear Mme/Sir, I have started using the GSL library one month ago. The latter is extremely helpfull to me due to the Numerical Analysis routines that it contains. More speciffically, I have already used several of the library's functions concerning real matrices and vectors. However, I have not been able to access the elements of a complex matrix. For example, after defining a 2x2 complex matrix A, I do not know how I may give values to the matrix elements; such as A(1,1)=1+j , A(1,2)=1-j, A(2,1)=-1+j, and A(2,2)=-1-j. I would be really gratefull for an example script. Thanks, Xenofon Doukopoulos France Telecom R&D