AW: Problems evaluating Grad
- To: mathgroup at smc.vnet.net
- Subject: [mg39401] AW: [mg39372] Problems evaluating Grad
- From: Matthias.Bode at oppenheim.de
- Date: Fri, 14 Feb 2003 03:18:11 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Hello Konrad,
Mathematica 4.1.1, Windows:
In[5]:=
<<Calculus`VectorAnalysis`
In[6]:=
f[x_,y_]:=x+y
Grad[f[a,b]]
Out[6]=
{0,0,0}
I learnt that packages sometimes do not get loaded properly if they are not
called from a separate cell.
Best regards,
Matthias Bode
Sal. Oppenheim jr. & Cie. KGaA
Koenigsberger Strasse 29
D-60487 Frankfurt am Main
GERMANY
Tel.: +49(0)69 71 34 53 80
Mobile: +49(0)172 6 74 95 77
Fax: +49(0)69 71 34 95 380
E-mail: matthias.bode at oppenheim.de
Internet: http://www.oppenheim.de
-----Ursprüngliche Nachricht-----
Von: Konrad Den Ende [mailto:chamsterkonrad at bigfoot.com]
Gesendet: Donnerstag, 13. Februar 2003 10:52
An: mathgroup at smc.vnet.net
Betreff: [mg39372] Problems evaluating Grad
I'd like to detrmine Grad to a function so i go:
<<Calculus`VectorAnalysis`
f[x_,y_]:=x+y
Grad[f[a,b]]
I get no errors, but the answer is simply the same thing
that i asked, as if no computation was done. What do i
do wrong?
Also - when i evaluated the examples in Help i got the same
behavior. The answer that already is there gets exchanged
to something else upon my evaluation. Namely, the question
itself. What is that?!
--
Vnligen
Konrad
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