#12968: round of symbolic expression (precision issue due to RR)
--------------------------------------------------------+-------------------
Reporter: dkrenn | Owner:
burcin
Type: defect | Status:
needs_work
Priority: major | Milestone:
sage-5.1
Component: symbolics | Resolution:
Keywords: round symbolic precision RR beginner | Work issues:
Report Upstream: N/A | Reviewers:
Burcin Erocal
Authors: Mike Hansen | Merged in:
Dependencies: | Stopgaps:
--------------------------------------------------------+-------------------
Changes (by jdemeyer):
* status: positive_review => needs_work
Comment:
This causes a doctest failure (see also the Patchbot):
{{{
sage -t -force_lib
devel/sage/sage/rings/polynomial/polynomial_rational_flint.pyx
**********************************************************************
File "/padic/scratch/jdemeyer/merger/sage-5.1.beta2/devel/sage-
main/sage/rings/polynomial/polynomial_rational_flint.pyx", line 596:
sage: f.reverse(I)
Expected:
Traceback (most recent call last):
...
TypeError: can't convert complex to int; use int(abs(z))
Got:
Traceback (most recent call last):
File
"/padic/scratch/jdemeyer/merger/sage-5.1.beta2/local/bin/ncadoctest.py",
line 1231, in run_one_test
self.run_one_example(test, example, filename, compileflags)
File
"/padic/scratch/jdemeyer/merger/sage-5.1.beta2/local/bin/sagedoctest.py",
line 38, in run_one_example
OrigDocTestRunner.run_one_example(self, test, example, filename,
compileflags)
File
"/padic/scratch/jdemeyer/merger/sage-5.1.beta2/local/bin/ncadoctest.py",
line 1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_17[19]>", line 1, in <module>
f.reverse(I)###line 596:
sage: f.reverse(I)
File "polynomial_rational_flint.pyx", line 608, in
sage.rings.polynomial.polynomial_rational_flint.Polynomial_rational_flint.reverse
(sage/rings/polynomial/polynomial_rational_flint.cpp:7922)
len = <unsigned long> n
File "expression.pyx", line 751, in
sage.symbolic.expression.Expression.__int__
(sage/symbolic/expression.cpp:4932)
ValueError: cannot convert I to int
**********************************************************************
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12968#comment:10>
Sage <http://www.sagemath.org>
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and MATLAB
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