Does anyone see what is causing the error here?
sage: var('x,y')
(x, y)
sage: v=vector([x,y,x^2+y])
sage: v.subs(x=1,y=2)
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
/home/grout/.sage/temp/good/23967/_home_grout__sage_init_sage_0.py in
<module>()
/home/grout/sage/local/lib/python2.5/site-packages/sage/structure/element.so
in sage.structure.element.Element.subs (sage/structure/element.c:3320)()
369 else:
370 variables.append(gen)
--> 371 return self(*variables)
372
373 def n(self, prec=None, digits=None):
/home/grout/sage/local/lib/python2.5/site-packages/sage/modules/free_module_element.so
in
sage.modules.free_module_element.FreeModuleElement_generic_dense.__call__
(sage/modules/free_module_element.c:13987)()
/home/grout/sage/local/lib/python2.5/site-packages/sage/calculus/calculus.pyc
in __call__(self, *args, **kwds)
1789 d[ vars[i] ] = args[i]
1790 except IndexError:
-> 1791 raise ValueError, "the number of arguments
must be less than or equal to %s"%len(self.variables())
1792
1793 return self.substitute(d, **kwds)
ValueError: the number of arguments must be less than or equal to 1
I think it traces back to trying to basically call the first expression
(x) with arguments 1 and 2, resulting in the same error message as:
sage: f=x
sage: f(1,2)
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
/home/grout/.sage/temp/good/23967/_home_grout__sage_init_sage_0.py in
<module>()
/home/grout/sage/local/lib/python2.5/site-packages/sage/calculus/calculus.pyc
in __call__(self, *args, **kwds)
1789 d[ vars[i] ] = args[i]
1790 except IndexError:
-> 1791 raise ValueError, "the number of arguments
must be less than or equal to %s"%len(self.variables())
1792
1793 return self.substitute(d, **kwds)
ValueError: the number of arguments must be less than or equal to 1
I guess my questions are:
1. Is my analysis of the error correct?
2. Why is it not just calling the .subs method for each component of the
vector? Is there something tricky that is going on here that I'm missing?
Thanks,
Jason
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