#15219: numerical integral needs an operand for callable symbolic functions
----------------------------+-------------------------
Reporter: kcrisman | Owner:
Type: defect | Status: new
Priority: minor | Milestone: sage-5.12
Component: calculus | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by kcrisman):
Here's the relevant code.
{{{
def symbol(self, ex):
r"""
EXAMPLES::
sage: f = x._fast_float_('x', 'y')
sage: f(1,2)
1.0
sage: f = x._fast_float_('y', 'x')
sage: f(1,2)
2.0
"""
if self.vars == ():
return self.ff.fast_float_arg(0)
vars = list(self.vars)
name = repr(ex)
if name in vars:
return self.ff.fast_float_arg(vars.index(name))
svars = [repr(x) for x in vars]
if name in svars:
return self.ff.fast_float_arg(svars.index(name))
if ex.is_symbol(): # case of callable function which is the
variable, like f(x)=x
name = repr(SR(ex)) # this gets back just the 'output' of the
function
if name in svars:
return self.ff.fast_float_arg(svars.index(name))
try:
return self.ff.fast_float_constant(float(ex))
except TypeError:
raise ValueError, "free variable: %s" % repr(ex)
}}}
Note that this case is supposedly already taken care of! But apparently
in this case `name` is not in `svars`. I'll investigate...
--
Ticket URL: <http://trac.sagemath.org/ticket/15219#comment:1>
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