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Doctest failure of sage/symbolic/expression.pyx on Solaris 10 x86 #9692

Closed bac7d3ea-3f1b-4826-8464-f0b53d5e12d2 closed 14 years ago

bac7d3ea-3f1b-4826-8464-f0b53d5e12d2 commented 14 years ago

An almost complete 32-bit port of Sage 4.5.2 to Solaris 10 on x86 processors had been done on the following hardware:

The following doctest failed. 

sage -t  -long devel/sage/sage/stats/hmm/chmm.pyx
**********************************************************************
File "/home/palmieri/fulvia/32bit/sage-4.5.2.rc1/devel/sage-main/sage/stats/hmm/chmm.pyx", line 570:
    sage: m.viterbi([0,1,10,10,1])
Expected:
    ([0, 0, 1, 1, 0], -9.0604285688230899)
Got:
    ([0, 0, 1, 1, 0], -9.0604285688230917)
**********************************************************************
File "/home/palmieri/fulvia/32bit/sage-4.5.2.rc1/devel/sage-main/sage/stats/hmm/chmm.pyx", line 132:
    sage: m.baum_welch(obs)
Expected:
    (-10.610333495739708, 14)
Got:
    (-10.61033349573971, 14)
**********************************************************************
File "/home/palmieri/fulvia/32bit/sage-4.5.2.rc1/devel/sage-main/sage/stats/hmm/chmm.pyx", line 134:
    sage: m.log_likelihood(obs)
Expected:
    -10.610333495739708
Got:
    -10.61033349573971
**********************************************************************
2 items had failures:
   1 of   7 in __main__.example_15
   2 of  12 in __main__.example_2
***Test Failed*** 3 failures.
For whitespace errors, see the file /home/palmieri/.sage_fulvia/tmp/.doctest_chmm.py

Some of these look like numerical rounding errors:

Expected:
    ([0, 0, 1, 1, 0], -9.0604285688230899)
Got:
    ([0, 0, 1, 1, 0], -9.0604285688230917)

but in other cases the number of digits being displayed is less than the expected value. 

Expected:
    -10.610333495739708
Got:
    -10.61033349573971

The "Got:" value is a correctly rounded version of the "Expected:" value, but I'm not sure if printing less digits is acceptable.

I personally like to see these numerical results being computed to high precision by another method if possible. I've got no idea how to compute these values, so have no idea if these are are anywhere near correct.

CC: @jhpalmieri

Component: doctest coverage

Issue created by migration from https://trac.sagemath.org/ticket/9692

jhpalmieri commented 14 years ago
comment:1

I think this ticket is a duplicate of #9735, #9689, and/or #9693. Is that right? Can it be closed?

(The ticket summary talks about symbolic/expression.pyx, which is covered by #9689 and #9693, while the description talks about chmm.pyx, which is covered by #9735.)

bac7d3ea-3f1b-4826-8464-f0b53d5e12d2 commented 14 years ago
comment:2

Yes, it can.

I've no idea why the title says one ticket and the description another. But I think we are clear about what the issues are.