I'm getting
{{{id=2|
def math_bessel_K(nu,x):
return mathematica(nu).BesselK(x).N(20).sage()
math_bessel_K(2,I)
///
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/tclemans/.sage/sage_notebook/worksheets/admin/5/code/
9.py", line 6, in <module>
exec compile(ur'math_bessel_K(Integer(2),I)' + '\n', '', 'single')
File "/home/was/s/data/extcode/sage/", line 1, in <module>
File "/home/tclemans/.sage/sage_notebook/worksheets/admin/5/code/
9.py", line 5, in math_bessel_K
return mathematica(nu).BesselK(x).N(Integer(20)).sage()
File "/home/was/s/local/lib/python2.5/site-packages/sage/interfaces/
expect.py", line 1086, in sage
return self._sage_()
File "/home/was/s/local/lib/python2.5/site-packages/sage/interfaces/
expect.py", line 1079, in _sage_
return sage.misc.sage_eval.sage_eval(repr(self))
File "/home/was/s/local/lib/python2.5/site-packages/sage/misc/
sage_eval.py", line 112, in sage_eval
raise SyntaxError, "%s\nError using SAGE to evaluate '%s'"%(msg,
p)
SyntaxError: invalid syntax (<string>, line 1)
Error using SAGE to evaluate '-
RealNumber('2.592886175491196978167651322538251462935637034451900356688')
+
RealNumber('0.180489972066962026629620880838378650496225604668529521981')*I'
}}}
On Dec 13, 11:21 am, "William Stein" <[EMAIL PROTECTED]> wrote:
> On Dec 13, 2007 11:08 AM, pgdoyle <[EMAIL PROTECTED]> wrote:
>
>
>
> > Let me simplify the question.
>
> > Is there a better way to get Mathematica to go off and compute a
> > Bessel function for me than this:
>
> > def math_bessel_K(nu,x):
> > m=mathematica('N[BesselK['+str(mathematica(nu))
> > +','+str(mathematica(x))+'],20]')
> > return m.sage()
>
> Yes there is, and you might even find this impressive:
>
> def math_bessel_K(nu,x):
> return mathematica(nu).BesselK(x).N(20).sage()
>
> Use it:
>
> sage: math_bessel_K(2,I)
> 0.180489972066962*I - 2.592886175491197
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