#9483: implicit_plot3d fails on symbolic inputs that can't be automatically
differentiated
------------------------+---------------------------------------------------
Reporter: cwitty | Owner: cwitty
Type: defect | Status: new
Priority: major | Milestone: sage-4.5
Component: graphics | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Here's an example:
{{{
sage: implicit_plot3d(max_symbolic(min_symbolic(x*x+y*y-1, x*x+z*z-2),
x-1.8, y-1.8, z-1.8, -x-1.8, -y-1.8, -z-1.8), (x, -2, 2), (y, -2, 2), (z,
-2, 2))
}}}
... VERY long traceback, ending:
{{{
/home/cwitty/sage/local/lib/python2.6/site-
packages/sage/symbolic/expression_conversions.pyc in fast_callable(ex,
etb)
1363
1364 """
-> 1365 return FastCallableConverter(ex, etb)()
1366
1367 class RingConverter(Converter):
/home/cwitty/sage/local/lib/python2.6/site-
packages/sage/symbolic/expression_conversions.pyc in __call__(self, ex)
216 return self.relation(ex, operator)
217 elif isinstance(operator, FDerivativeOperator):
--> 218 return self.derivative(ex, operator)
219 else:
220 return self.composition(ex, operator)
/home/cwitty/sage/local/lib/python2.6/site-
packages/sage/symbolic/expression_conversions.pyc in derivative(self, ex,
operator)
349 NotImplementedError: derivative
350 """
--> 351 raise NotImplementedError, "derivative"
352
353 def arithmetic(self, ex, operator):
NotImplementedError: derivative
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9483>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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