On Fri, May 9, 2008 at 5:02 AM, Babai <[EMAIL PROTECTED]> wrote:
> The RUN 2nd time:
>>>
> x,y=var("x,y")
> f(x,y)=sin(x)+cos(y)
> grads=[diff(f,var) for var in (x,y)]
> plot_vector_field(grads,[-5,5],[-5,5])
>
> Result>>
> Traceback (most recent call last): grads=[diff(f,var) for var in
> (x,y)]
> ValueError: too many values to unpack
>
> in SAGE Notebook
>
> Then I reduce the run to:
>>>
> x,y=var("x,y")
>
> I get the result:
>>>
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "/root/.sage/sage_notebook/worksheets/admin/6/code/6.py", line
> 6, in <module>
> x,y=var("x,y")
> File "/root/sage-3.0.1-fc8-x86-i686-Linux/local/lib/python2.5/site-
> packages/sympy/plotting/", line 1, in <module>
>
> ValueError: too many values to unpack
With the above clearer description I am able to replicate this and do consider
it a subtle, serious, and interesting bug. Thanks for the bug report
and persisting
in explaining it well! We are now tracking this at
http://trac.sagemath.org/sage_trac/ticket/3144
William
--
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org
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