[SciPy-User] understanding machine precision

Fabrice Silva silva@lma.cnrs-mrs...
Tue Dec 14 14:08:34 CST 2010


What I get:
$ python -i try_deterministic.py 

lstsq
0.0
0.0
0.0
0.0
0.0

pinv
0.0
0.0
0.0
0.0
0.0

pinv2
0.0
0.0
0.0
0.0
0.0
>>> np.show_config()
blas_info:
    libraries = ['blas']
    library_dirs = ['/usr/lib64']
    language = f77

lapack_info:
    libraries = ['lapack']
    library_dirs = ['/usr/lib64']
    language = f77

atlas_threads_info:
  NOT AVAILABLE

blas_opt_info:
    libraries = ['blas']
    library_dirs = ['/usr/lib64']
    language = f77
    define_macros = [('NO_ATLAS_INFO', 1)]

atlas_blas_threads_info:
  NOT AVAILABLE

lapack_opt_info:
    libraries = ['lapack', 'blas']
    library_dirs = ['/usr/lib64']
    language = f77
    define_macros = [('NO_ATLAS_INFO', 1)]

atlas_info:
  NOT AVAILABLE

lapack_mkl_info:
  NOT AVAILABLE

blas_mkl_info:
  NOT AVAILABLE

atlas_blas_info:
  NOT AVAILABLE

mkl_info:
  NOT AVAILABLE

>>> np.__version__
'1.3.0'

on Ubuntu and x86_64

-- 
Fabrice Silva



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