[Numpy-discussion] Numeric eigenvectors problem on Linux

[Alexandre Gillet]

Hi,
I would like to know if anybody as experience any problem in their 
result using eigenvector function on Linux

The same calculation return the correct value on Windows,SUN,SGI.
All the Numeric were built without out modifying the setup.py file. I 
just run python setup.py install  (python2.3, Numeric 23.0)

The test script we run is the following:
import Numeric
import LinearAlgebra
e = Numeric.array([[ 0.6875,-0.3125,0.3125],
                    [-0.3125 , 0.6875 , 0.3125],
                    [ 0.3125 , 0.3125 , 0.6875]])
evals, evecs = LinearAlgebra.eigenvectors(e)
print "----------------------------------"
print "evecs",evecs


on Linux we  get:
evals [ 1.      0.0625  1.    ]
evecs [[ 0.81649658 -0.40824829  0.40824829]
	 [-0.57735027 -0.57735027  0.57735027]
  	[-0.26840956  0.80201256  0.533603  ]]

On all others platforms we get:
evals [ 1.      0.0625  1.    ]
evecs [[ 0.81649658 -0.40824829  0.40824829]
  	[-0.57735027 -0.57735027  0.57735027]
	 [-0.22645541  0.79259392  0.56613852]]


Any idea? Is it a bug in Numeric?

Thanks
Alex


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   o Alexandre Gillet               email: gillet at scripps.edu
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