first k eigenvalues

[flashpixx]

Hello,

I'm new here and I'm writing code under C++ with ATLAS, LAPACK and BOOST. I calculate eigenvalues and -vectors with ggev and geev with the numerical bindings of the BOOST. That works fine. For a local linear embedding I have got a very large dense matrix and I need only the first k eigenvalues and -vectors. Is there a special command call that only calcluates the first k (biggest) eigenvalues with their vectors which I can use?

Thanks

Phil

[admin]

You can take a look here: http://icl.cs.utk.edu/lapack-forum/view ... f=2&t=1429
Julie

[flashpixx]

Thanks, it's the same problem. I will take ARPACK