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Numeric troubleshooting

Numeric has a fragile interface to some Fortran libraries which can lead to weird effects depending on compiler and platform.

To test if your Lapack is broken type this in your python interpreter:

from Numeric import *
from LinearAlgebra import eigenvalues
x = array([[1,2],[3,4]])

There are several possible solutions to this problem. First try to rebuild Numeric after setting a compiler flag:

python build

See: (Thanks to Anders for pointing this out)

If this doesn't work, the best strategy is to rebuild Numeric against external Lapack/Atlas libraries: See Lapack & Atlas !