#15219: numerical integral needs an operand for callable symbolic functions
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Reporter: kcrisman | Owner:
Type: defect | Status: new
Priority: minor | Milestone: sage-5.12
Component: calculus | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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I feel like I've seen this before, so close if appropriate...
{{{
sage: h(x) = x
sage: numerical_integral(h, 1, 2)
---------------------------------------------------------------------------
/Users/.../sage-5.11.rc0/local/lib/python2.7/site-
packages/sage/symbolic/expression_conversions.pyc in fast_float(ex, *vars)
1264 1.4142135623730951
1265 """
-> 1266 return FastFloatConverter(ex, *vars)()
1267
1268 #################
/Users/.../sage-5.11.rc0/local/lib/python2.7/site-
packages/sage/symbolic/expression_conversions.pyc in __call__(self, ex)
206 operator = ex.operator()
207 if operator is None:
--> 208 return self.symbol(ex)
209
210 if operator in arithmetic_operators:
/Users/.../sage-5.11.rc0/local/lib/python2.7/site-
packages/sage/symbolic/expression_conversions.pyc in symbol(self, ex)
1182 return self.ff.fast_float_constant(float(ex))
1183 except TypeError:
-> 1184 raise ValueError, "free variable: %s" % repr(ex)
1185
1186 def arithmetic(self, ex, operator):
ValueError: free variable: x |--> x
}}}
but
{{{
sage: numerical_integral(x, 1, 2)
(1.5, 1.6653345369377348e-14)
}}}
I think this should be easy to fix by catching this somehow.
--
Ticket URL: <http://trac.sagemath.org/ticket/15219>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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