James G Analytis schrieb:
Dear Pearu, SciPy's linalg modules are just what I need. However, I get the following problem on importing SciPy:
ATLAS is also required. http://math-atlas.sourceforge.net/ Nils
import scipy exceptions.ImportError: /usr/lib/python2.2/site-packages/scipy/linalg/flapack.so : undefined symbol: sgesdd_ exceptions.ImportError: /usr/lib/python2.2/site-packages/scipy/linalg/_flinalg.s o: undefined symbol: dlaswp_ Traceback (most recent call last): File "<stdin>", line 1, in ? File "/tmp/SciPyTest/linux2/lib/python2.2/site-packages/scipy/__init__.py",
[analytis@toomey analytis]$ python2 Python 2.2 (#1, Apr 12 2002, 15:29:57) [GCC 2.96 20000731 (Red Hat Linux 7.2 2.96-109)] on linux2 Type "help", "copyright", "credits" or "license" for more information. li ne 42, in ? File "/usr/lib/python2.2/site-packages/scipy/special/__init__.py", line 328, i n ? import orthogonal File "/usr/lib/python2.2/site-packages/scipy/special/orthogonal.py", line 59, in ? from scipy.linalg import eig File "/tmp/SciPyTest/linux2/lib/python2.2/site-packages/scipy/linalg/__init__. py", line 40, in ? File "/tmp/SciPyTest/linux2/lib/python2.2/site-packages/scipy/linalg/basic.py" , line 17, in ? ImportError: /usr/lib/python2.2/site-packages/scipy/linalg/calc_lwork.so: undefi ned symbol: ieeeck_
I am running standard Red Hat 7.3 with a smp kernel, on a dual-processor PIII. Is there anything I should watch out for (compiler issues perhaps)? I appreciate the help! Cheers, James
On Monday 12 Aug 2002 9:04 am, Pearu Peterson wrote:
On Mon, 12 Aug 2002, James G Analytis wrote:
Hi, I'm looking for a QR algorithm that can decompose complex matrices. The LinearAlgebra package from Numeric doesn't seem to have it. SciPy's linalg package is still on the way, so I can't use that either.
Try SciPy's linalg package again (from CVS), the QR functions is working
now:
from scipy import linalg from Numeric import dot q,r=linalg.qr([[1,2],[3j,4]]) print q
[[-0.31622777+0.j -0.78935222-0.52623481j] [ 0. -0.9486833j -0.1754116 +0.26311741j]]
print r
[[-3.16227766+0.j -0.63245553+3.79473319j] [ 0. +0.j -2.28035085+0.j ]]
print dot(q,r)
[[ 1. +0.00000000e+00j 2. -8.71264866e-16j] [ 0. +3.00000000e+00j 4. +3.09051829e-16j]]
Regards, Pearu
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