[SciPy-User] FAIL: gaussian filter 3

Nils Wagner nwagner@iam.uni-stuttgart...
Sat Nov 20 09:29:06 CST 2010


On Sat, 20 Nov 2010 09:05:38 -0600
  Warren Weckesser <warren.weckesser@enthought.com> wrote:
> On Sat, Nov 20, 2010 at 5:15 AM, Nils Wagner
> <nwagner@iam.uni-stuttgart.de>wrote:
> 
>> Hi all,
>>
>> is this a known issue ?
>>
>> ======================================================================
>> FAIL: gaussian filter 3
>> ----------------------------------------------------------------------
>> Traceback (most recent call last):
>>   File
>>
>> "/home/nwagner/local/lib64/python2.6/site-packages/nose-0.11.2.dev-py2.6.egg/nose/case.py",
>> line 183, in runTest
>>     self.test(*self.arg)
>>   File
>>
>> "/home/nwagner/local/lib64/python2.6/site-packages/scipy/ndimage/tests/test_ndimage.py",
>> line 468, in test_gauss03
>>     assert_almost_equal(output.sum(), input.sum())
>>   File
>> "/home/nwagner/local/lib64/python2.6/site-packages/numpy/testing/utils.py",
>> line 463, in assert_almost_equal
>>     raise AssertionError(msg)
>> AssertionError:
>> Arrays are not almost equal
>>  ACTUAL: 49993304.0
>>  DESIRED: 49992896.0
>>
>>
> 
> Hi Nils,
> 
> Thanks for reporting the problem.  It looks like this 
>failure was introduced
> in r6837, when the ndimage tests were cleaned up.  The 
>old version of
> test_gauss03() computed the sums of the 32 bit floats 
>using 64 bit
> accumulators, but the new version did not.  However, 
>simply changing the
> size of the accumulators did not fix the test, because 
>r6837 actually fixed
> a bug in the old test: the old test was testing the 
>difference of the actual
> and expected sums, rather than the *absolute value* of 
>the difference.  It
> turns out that the default precision requested by the 
>test was too high.
> 
> The test has been fixed in r6927.
> 
> Warren

Hi Warren,

Thank you for your prompt response.
There is still one failure ...

======================================================================
FAIL: line-search Newton conjugate gradient optimization 
routine
----------------------------------------------------------------------
Traceback (most recent call last):
   File 
"/home/nwagner/local/lib64/python2.6/site-packages/scipy/optimize/tests/test_optimize.py", 
line 177, in test_ncg
     assert_(self.gradcalls == 18, self.gradcalls) # 0.8.0
   File 
"/home/nwagner/local/lib64/python2.6/site-packages/numpy/testing/utils.py", 
line 34, in assert_
     raise AssertionError(msg)
AssertionError: 16

----------------------------------------------------------------------
Ran 4842 tests in 142.173s

FAILED (KNOWNFAIL=13, SKIP=28, failures=1)

  
Cheers,

                Nils


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