Problems evaluating Grad

*To*: mathgroup at smc.vnet.net*Subject*: [mg39372] Problems evaluating Grad*From*: "Konrad Den Ende" <chamsterkonrad at bigfoot.com>*Date*: Thu, 13 Feb 2003 04:52:09 -0500 (EST)*Organization*: Gothenburg University*Sender*: owner-wri-mathgroup at wolfram.com

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?! -- Vänligen Konrad --------------------------------------------------- phone #1: (+46/0) 708 - 70 73 92 phone #2: (+46/0) 704 - 79 96 95 url: http://konrads.webbsida.com e-mail: chamsterkonrad at bigfoot.com ----------------------------------- Sleep - thing used by ineffective people as a substitute for coffee Ambition - a poor excuse for not having enough sence to be lazy ---------------------------------------------------

**Follow-Ups**:**Re: Problems evaluating Grad***From:*Murray Eisenberg <murraye@attbi.com>

**Re: Problems evaluating Grad***From:*Kirk Reinholtz <kirk.reinholtz@jpl.nasa.gov>