And Orlando Döhring writes: > Is there a listing for the error codes from Lapack routine 'dsyevr'?
The HTML-ized LAPACK functions are at http://www.netlib.org/lapack/explore-html/ although they may lag behind releases a little bit. The page for dsyevr.f is: http://www.netlib.org/lapack/explore-html/dsyevr.f.html And the LAPACK mailing list is at lap...@cs.utk.edu, although as with all such projects, responses may be a *long* time in coming. > Especially I am interested about the meaning and handling of error codes 1 > and 2. The high-level drivers like DSYEVR dispatch to different internal routines depending on what was requested. That makes documenting the error codes a little painful... For some of the routines involved, INFO.eq.1 or 2 implies 1 or 2 entries didn't converge, either when reducing a tridiagonal to diagonal, in bisection, or in inverse iteration. For another, but only if you're requesting the ilo-th through ihi-th eigenvalues, 2 would imply non-monotonic arithmetic, and I would be *very* surprised. So likely something somewhere didn't converge. Picking parameters that *always* converge for eigenvalues is an open problem. Have you tried this on different platforms, or with different BLAS? Can you release the data that causes the problem? Jason ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
